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