I have read around 25-30 of them in total I think. Rereading The Polar Treasure at the moment because that's the one I'm drawing from for the book I'm writing

When I was a kid I found like 20 of these in a used bookstore. The first one I read was The Gold Ogre and I just sat there until I finished it.

You should check out Sacrament by Clive Barker

well neither technically. This story is set in a world with two massive unexplored icy continents, this adventure is on the bigger of the two