5 books • 1 series
Spaceboy and Earthgirl (Adventures of Spaceboy S., #2)
Spaceboy in the Treetops (Adventures of Spaceboy S., #5)
Spaceboy in the Solar System (Adventures of Spaceboy S., #3)
Spaceboy in Combat (Adventures of Spaceboy S., #4)
Spaceboy and the Aliens (Adventures of Spaceboy S., #1)