Stephen Baxter books in order
32 books in the catalogue, about 258 hours of reading in all; the shortest takes 5 hours and the longest 12 hours.
5 series and 20 standalone books in the catalogue.
Xeelee Sequence
14 books 1 
Raft 5.0 h 
Flux 6.9 h 4 
Ring 9.1 h 5 
Vacuum Diagrams 8.4 h 
Exultant 9.4 h
Raft 5.0 h 2 Timelike Infinity length not known
3 Flux 6.9 h 4 Ring 9.1 h 5 Vacuum Diagrams 8.4 h 6 Reality Dust length not known
Coalescent length not known
Exultant 9.4 h Remembrance length not known
Starfall length not known
Xeelee: Endurance length not known
Xeelee: Vengeance length not known
Xeelee: Redemption length not known
Destiny's Children length not known
Manifold
2 books
Destiny's Children
4 books
Flood/Ark
2 books 1 
Flood 9.1 h
Flood 9.1 h 2 Ark length not known
Time's Tapestry
4 books
Standalone books
Timelike Infinity 4.7 h 
The Time Ships 9.1 h 
Voyage 11.2 h 
The Mammoth Book of New Sherlock Holmes Adventures 9.6 h 
Titan 10.9 h 
The Light of Other Days 5.8 h 
The Medusa Chronicles 7.6 h 
Evolution 11.8 h 
Time's Eye a Time Odyssey 7.0 h 
Sunstorm 6.1 h 
The Best Science Fiction and Fantasy of the Year, Volume Three 9.1 h 
The Improbable Adventures of Sherlock Holmes 7.4 h 
Other Worlds Than These 7.3 h 
The Long Earth 7.3 h 
The Science Of Avatar 5.1 h 
Proxima 8.9 h 
The Long Cosmos 8.2 h 
The Long War 9.0 h 
The Long Mars 7.8 h 
The Long Utopia 7.3 h