Dr John Freeman
@scifiguy.bsky.social
Hopeless ball of stress - writes booklets to help authors, gamers, GMs, and other creatives with the space and technology details of their projects, when they need that. 'Cos I went and got a PhD in engineering and physics, and I like helping people.
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 17, 2025 at 11:50 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 17, 2025 at 11:50 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 17, 2025 at 11:49 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 8:09 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 8:09 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 8:08 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 8:07 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 2:50 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 2:49 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 2:48 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 2:47 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun - John Freeman | DriveThruRPG.com
Hard S.F. Worldbuilding Cookbook #4.8: The Cinder: A star system with a dull, maroon, sun
A how-to guide for writers an
legacy.drivethrurpg.com
November 16, 2025 at 2:46 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo