Don't miss any of Richard P. Feynman's engaging physics lectures.
(P)1998 Perseus Publishing
"Great material, ill suited to audio book format"
You can hear Feynman writing on the chalkboard and gesturing at diagrams and equations there. But listening to him read the equations (without seeing them) is difficult on a good day. Listening to him merely point to one alredy on the board (i.e. nothing but a chalk click) is impossible.
Despite that, you do get to get hear Feynman himself, in his voice with his own interesting style of presentation, including some bits of humor. There are interesting qualitative bits of information along the way, which can be picked up without seeing the equations, that still make it worth listening to.
This review applies to volumes 1 & 4 (the two I have tried). "Six Not So Easy Pieces", while similar in that it's a recording of his lectures, is much better suited to audiobook format as the lectures are more descriptive.