Books like The Long Cosmos
Terry Pratchett, Stephen Baxter, Gabriel Dols Gallardo
The Long Cosmos is 448 pages, about 8 hours 13 minutes at 250 words a minute.
12 books to read next
How long each takes
Children of the Mind 7.0 h 
Illuminae 11.2 h 
We Are Legion 6.3 h 
Record of a Spaceborn Few 6.6 h 
The Collapsing Empire 6.2 h 
Gemina 12.3 h 
Star Wars - Outbound Flight 8.7 h 
Aurora 8.6 h 
For We Are Many 6.4 h 
Earth Awakens 7.3 h 
The Skylark of Space 4.1 h 
Mars 10.2 h Bar height shows length. Estimated at 250 words a minute.