Lord of the Rings was six books? Wasn't it a trilogy? Nope. Says the book, "the Lord Of The Rings is often erroneously called a trilogy, when it is in fact a single novel, consisting of six books plus appendices, published for convenience in three volumes...". You didn't know that... did you?
Anyways, this book will look really cool in your collection with the rest of the LOTR movies and stuff and it's a great read if you haven't read it earlier.. Grab it from here. And if you are lucky, you can catch the special price.
