This book is legendary. In fact, it should really, really, be digitised and put on the International Space Station just in case some unforeseen circumstance wipes out all the copies of it on Earth.
L.M.S. is not your typical artbook. It's basically the 'scrapbook' of the protagonist, the Paladin Gabriel, with notes/"official" information/newspaper reports about some of the main characters you'll see in the world of L.M.S. Once you start flipping through it, you'll feel the effort/love/sweat and megatons of blood Dan poured into this book. You won't want to put it down.
The art is top class. If you're not convinced, go take a look at Dan's portfolio site danluvisiart[dot]com or his deviantart page adonihs[dot]deviantart[dot]com
It's printed on massive, massive pages with really good colours. The book itself feels like it could take a bullet for you.
But that's not all. L.M.S. is not just an artbook, as I mentioned earlier. It's not just the art, the layout and the story deserve mention too. You'll find Dan's art gracing the pages in all manners and forms, whether it'd be an advertisement, movie trailer or even a little toy version of the characters. You'll find the details about weapons used by the characters, their backstories, score cards which has the protagonist giving them a stat score etc.
If you're more familiar with Dan's work, you'll find little easter eggs and nods to the people in his life, which really sets this apart. Dan even included a list of questions fielded by his own fans and a whole list of names to thank all the people who have been supporting his work, which is a very nice touch.
It stands up there with some of the best books I've seen in a while. There's the correct balance of art and text, and the story laid out for you in this book just makes you want to read the rest of it as soon as possible.
So art, checked. Story, checked. Layout, checked. Printing, checked. I think that makes a pretty good book.