The World at the End of Time
Frederik Pohl
Star of stars
Pythias
Homegoing
Heechee rendezvous: a novel
Heechee Rendezvous
The Hated
Gateway
The Far Shore of Time
The Day of the Boomer Dukes
Day Million
Beyond the Blue Event Horizon (Heechee Saga)
Beyond the blue event horizon
The age of the pussyfoot