Ringworld's Children

The Ringworld Throne

The Ringworld Engineers

Fate of Worlds (Return from the Ringworld) (Known Space)

Ringworld (A Del Rey book)

Juggler of Worlds: 200 Years Before the Discovery of the Ringworld (Known Space)

Fleet of Worlds: 200 Years Before the Discovery of the Ringworld (Known Space)

Destroyer of Worlds

Betrayer of Worlds: Prelude to Ringworld (Known Space)

Protector

Three Books of Known Space