I was given the UFC encyclopedia from a friend for Christmas.
It's 400 pages long, very big book in size, it's 12 x 10, quite large. It has a list of every UFC fighter with 1-2 pages of info/facts/biography about certain fighters in between like GSP/Penn/Silva/Randy and like 10 more, and just a short paragraph about the others on the roster.
Then it has their top 25 best fights, top 25 upsets, top 10 bizare moments, top 10 this top 10 that, bunch of lists, and then every event from UFC 1 to UFC 130 (I think this is where it ends) and the results of each event with photos of each fight in the event, with all the TUF history/series, all about the octagon girls, how the UFC is related to the American military (short page on it), a "fun fact" page with some interesting notes that one might not know, etc etc. It also has a few sections dedicated to things like PRIDE and international fight leagues/fighters.
It's quite a comprehensive encyclopedia for an MMA fan with a lot of photos/images, it's colorful, has a lot of info. I highly recommend it to anyone who wants such a book, it's about 30 bucks (I googled), and for new fans it is great for learning about the sport/UFC/history, and for big fans like us it's a pretty cool thing to have.