Books like Theory of Fun for Game Design
Raph Koster
Theory of Fun for Game Design is 275 pages, about 5 hours 3 minutes at 250 words a minute.
12 books to read next
How long each takes
The Art of Game Design 11.2 h 
Fundamentals of Game Design 11.0 h 
Game Ai Pro 360 4.9 h 
Game Feel 6.9 h 
SuperBetter 8.7 h 
3D Game Environments 7.3 h 
Dragon Ball Z 2.4 h 
Spelunky 4.1 h 
SimCity 2000 8.2 h 
Level Up! 9.5 h 
Design for How People Learn 5.6 h 
Reality Is Broken 7.2 h Bar height shows length. Estimated at 250 words a minute.