Betrayer of Worlds (Fleet of Worlds series)
Juggler of Worlds
Destroyer of Worlds
Ringworld's Children
The Ringworld Throne (Ringworld Series, Book 3)
The Ringworld Engineers (Ringworld Series, Book 2)
Lucifer's Hammer
Fate of Worlds: Return from the Ringworld (Ringworld series, Book 5)
Protector: A Classic of Known Space