Each chapter is by a different writer, who looks at some interesting topic (e.g. friendship, gender, motherhood) and then uses examples from TBBT to i..Show More »llustrate their points. The writers are all of a scientific bent, but more into philosophy or psychology than physics. I would say that they are uniformly well-read and thoughtful. The result is fascinating and well researched - no empty pontificating, all backed up with authorities, research or reason (and quotes from the TV shows). I particularly liked the habit of systematically giving the dates of the sources (as in, Aristotle, 384-322BC) [May Google Light All Their Days]. In fact, I may try to pick up that habit myself (1957 to present).
I should perhaps mention that the book is not FUNNY. If you only watch the TV series for a few cheap laughs at the expense of some Geeks, you probably won't enjoy this book. We are definitely in the Natural Sciences corner of the pub for this one.
Lastly, excellent narrator for Sheldon's accent - how does he segue so seamlessly into Sheldon's voice? Though his French pronunciation is bizarre even for an American. I've never heard anyone pronounce 'raison d'etre' as 'raisn de tre' before.