The Green Hills of Earth and The Menace from Earth
Robert A. Heinlein
130 Sidetracked to Danger
Franklin W. Dixon
The Hardy Boys Mystery Stories (130)
028 The Sign of the Crooked Arrow
The Hardy Boys Mystery Stories (28)
Bear Head (Dogs of War)
Adrian Tchaikovsky
Solitude
Michael Harris
Clue of the Leaning Chimney
Carolyn Keene