Guardians of Jupiter
Felix R. Savage
Void Dragon Hunters (1)
Runaway Bomb
Gordon Cope
Jack Kenyon Mystery (4)
Shadow Agents
David Alastair Hayden
Wilder: The Guardian Series
G. K. Derosa
The Guardian (1)
The Last Theorem
Arthur Charles Clarke & Frederik Pohl
Time's Eye
Arthur Charles Clarke & Stephen Baxter
Time Odyssey (1)