As promised, here are photos I took of The Art of Total War.
Here is the table of contents. The book focuses on three branches of the Total War family — Shogun 1 & 2, Empire & Napoleon, and Rome 1 & 2. There is less on Medieval & Medieval 2, and less still, a bare few pages, on Attila and the spin-offs (Battles, Arena).
The art itself ranges from unit sketches to concept paintings, and even some of the original maps that the developers used as inspiration. Read on: