Technically 100 Km is spaceflight. People who go above the Kármán line have been in space, including some X-15 pilots.

If the ever get the humanned Artemis capsule up it'll go a little further than Apollo. I like your log scale.

Internal Combustion by Edwin Black

I would recommend the non-horror collection Different Seasons, which is four novellas, three of which have been made into movies.