Update on 2019-03-15: fix missing book titles.
Top Books on Stack Overflow
Top Books on Stack Exchange - Mathematics
Top Books on Stack Exchange - Science Fiction & Fantasy
Top Books on Stack Exchange - Cross Validated
Top Books on Stack Exchange - Physics
Top Books on Stack Exchange - Software Engineering
Top Books on Stack Exchange - English Language & Usage
Top Books on Stack Exchange - Role-playing Games
Top Books on Stack Exchange - Electrical Engineering
Top Books on Stack Exchange - Server Fault