I've read the book and while I enjoyed it, there were a couple of things I wish had been included.

I wish the author had included more contemporary examples of stoicism in practice. He mentions Admiral Stockdale's experiences but does not get into any detail. It would have been nice to see how people in recent history have put Stoicism into practice, instead of just hypotheticals. It would have also been interesting to tie ancient stoicism to contemporary work done in psychology, neuroscience, and sociology.