Hmmm... i dont actually have this book so i dont know if it is good or not..
but i think the most natural try would be the FOTR journeybook (or the rulebook if you get that somewhere) however i havent gotten any of these so dont just trust me... ask other users first
http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat1290176&prodId=prod1140179

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Eru was the one who on Arda is called Ilúvatar

-The silmarillion by J.R.R Tolkien, first line-

Books:
How to Build Realistic Model Railroad Scenery 3rd addition by Dave Frary.
This is a terrain book not a track wiring guide. It covers materials, building, molds, paint. casting coloring plaster, and most methods. It covers how to use scenic materials. It also has a section for making your own scenic material and how to go about painting teddy bear fur to make long grass. It is a must have book.

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"the same as a duck you must be made of wood"

Antenociti's Workshop also has some useful information (aswell as great hobby supplies).

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My Hobby site.

Just to update the thread...
I have drafted my ruin but im not going to start it for a while.
I've started a small diorama (10cmx10cm) for the Radagast figure I got recently and I'm going to enter it in to the forum competition if it comes out ok.

This is my first every diorama/scenary building project so I wanted to start off a little smaller so that I'm a bit more experianced when it comes to making something I actually want to use.

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It's all fun and games untill someone gets hurt.
Then it's a sport.