For anyone who has seen Jackson's video blog, there is virtually nothing in this book. This is a coffee table size book except it's very thin at only 119 pages. There are some nice color photos of the major actors, some information about the casting, sets, makeup and costumes but the book was produced before any of the movies were released so there were a LOT of things that they couldn't, or didn't want to, show in the book. They mentioned Gollum only to say that he wasn't included in the book and neither was Andy Serkis. How does the official movie guide totally leave out a major character? There are also some contradictions of later articles and interviews. For example, after filming had started, Stuart Townsend was replaced by Viggo Mortensen and they blamed "creative differences" in the book. But later they claimed that he was too young for the role.
All, and I do mean ALL, of the actors' comments are just saying how very very well everyone got along on the set and how much they love each other. Ian McKellen speculates about them all getting tattoos, which apparently they did because there was a photo of them sometime later on Instagram.