First: it's much smaller than I expected it to be. It really doesn't matter, I like the book, but it's also... weird. So many data in so little space. Let's talk about crowded pages.
3rd: Almost no information about Arwen. I know (because I've already read it in this book) that there weren't many women in Tolkien's life and it likely influenced him on writing LOTR, but still... I mean, she was so cool in the movies (Liv Tyler was the best Arwen they could have ever chosen) I will always thank PJ and his wife (specially, his wife) for what they did to Arwen's character. I'm not completely happy with Rotk (it'd have been better to see Arwen riding to give Ánduril to Aragorn, not Elrond), but I think they did a very good job. But, like I said: not enough Arwen, which makes me unhappy =(
I haven't read this book yet. I was going to re-read Harry Potter and the Chamber of Secrets but I've changed my mind and I'll read this book first. It seems to be full of details about the movies and the books. Details I'm probably well aware of, since I've seen all dvd's and listened to almost all audio-commentaries; I skipped the ones by producers, from the TT dvd's, they seemed too happy with the love triangle bullshit.