Timelike infinity
Stephen Baxter
Xeelee Sequence (2)
New Earth
Ben Bova
The Grand Tour (21)
Dealer's Choice
George R.R. Martin
Wild Cards (11)
A Trick of Light
Stan Lee
Stan Lee's Alliances (1)
The Roads Must Roll
Robert A. Heinlein
Future History or "Heinlein Timeline" (3)
Ordeal in Space
Future History or "Heinlein Timeline" (15)