This book is mediocre at best. It's a very, very condensed version of various 'secret' societies w/ special emphasis on groups covered in various Dan Brown books. I enjoyed seeing some of the photos, but it was more of magazine-blurb type writing rather than anything in-depth. (Guess I should have suspected that w/ it being a Time publication, huh?) Most groups were ones I already knew at least a little about, so this book provided very little new info for me. Coverage of the groups was also quite uneven; some groups had pages while others had half a page or less. I really couldn't discern what or why some groups were included while others were not. Some of the writing was fairly impartial, while other parts had personal comments interjected by the writers. It might be ok if you're looking for a very broad listing of groups like this as a starting point which would lead you to more research; unfortunately, there is no bibliography. Overall, though, it's very uneven and too general to be of great interest, imo.