12 books — in reading order
Rocket Ship Galileo
Robert A Heinlein
Space Cadet
Red Planet
Farmer in the Sky / Satellite Scout
Between Planets / Planets in Combat
The Rolling Stones / Tramp Space Ship / Space Family Stone
Starman Jones
The Star Beast / Star Lummox
Tunnel in the Sky
Time for the Stars
Citizen of the Galaxy
Have Space Suit—Will Travel
