Unseen Academicals
Terry Pratchett
Discworld (37)
Equal Rites
Discworld (3)
Vacuum Diagrams
Stephen Baxter
Xeelee Sequence (5)
The Undead Day Three
R.R. Haywood
The Undead (3)
The Green Hills of Earth
Robert A. Heinlein
Future History or "Heinlein Timeline" (16)