By the pricking of my thumbs
Agatha Christie
Tommy and Tuppence (4)
Xenocide
Orson Scott Card
The Ender Saga (3)
Nimisha's Ship
Anne McCaffrey
Standalone Novels (2)
The Mote in God's Eye (Moties Series 1)
Larry Niven & Jerry Pournelle
Motes Series (1)
Freedom's Choice
Catteni (2)