The secret adversary
Agatha Christie
Tommy and Tuppence (1)
Blood and Gold
Anne Rice
Dragonsong
Anne McCaffrey
Dragonriders Of Pern (3)
The Restaurant at the End of the Universe
Douglas Adams
Hitchhiker's Guide to the Galaxy (2)
Foundation and Empire
Isaac Asimov
Foundation (Publication Order) (2)
Foundation
Foundation (Publication Order) (1)