Well, there are now 2 books that seem to sit wonderfully alongside the LoTR gaming books, as a work of Fiction in support of Tolkiens world.
The first is;
The Atlas of Middle Earth
ISBN; 026110277X
A somewhat older book, reprinted to sit alongside PJ's work. Full of maps and the history of Middle Earth, throughout Tolkiens work. Including some detail about the great battles in the Silmarillion and in the War of the Ring.
But then today I found one of the many books released to support PJ's film Trilogy;
Lord of the Rings Weapons and Warfare
ISBN, 000717201X
Now this book has all of the battles from the films, and some of the locations, military units, along with concept sketches, costume photos, production photos, detailing the armour and weapons seen in the films... Alomg with some useful information in support of some of the discussion going on in here about some of the missing weapons and named weapons...
Enjoy, as these reference books deserve a place with the main game books.