Richard P. Feynman books in order
14 books in the catalogue, about 77 hours of reading in all; the shortest takes 2 hours and the longest 11 hours.
13 standalone books in the catalogue.
Standalone books
The Feynman Lectures on Physics 9.4 h 
The Character of Physical Law 3.2 h 
"Surely You're Joking, Mr. Feynman" 6.5 h 
QED 3.1 h 
The Feynman Lectures on Physics Vol 1 11.2 h 
What Do You Care What Other People Think? 4.7 h 
No Ordinary Genius 5.0 h 
Six Easy Pieces 2.7 h 
Feynman Lectures on Computation 5.6 h 
Six Not-so-easy Pieces 2.8 h 
The Meaning of It All 2.4 h 
The Pleasure of Finding Things Out 5.0 h 
Perfectly Reasonable Deviations from the Beaten Track 8.9 h Collected editions
Volumes that gather several of the books above.