= Genius: Richard Feynman and Modern Physics by James Gleick (1994)
{c}
This is a good book.
It has some overlap with <Surely You're Joking, Mr. Feynman>, which it likely takes as primary sources of some stories.
However, while Surely goes into a lot of detail of each event, this book paints a more cohesive and global picture of things.
In terms of hard physics/mathematics, this book takes the approach of spending a few paragraphs in some chapters describing in high level terms some of the key ideas, which is a good compromise. It does sometime fall into the sin of <to talk about something without giving the real name to not scare off the audience>, but it does give a lot of names, notably it talks a lot about <Lagrangian mechanics>. And it goes into more details than Surely in any case.