I own and run two smallish ( ~ $1 mill/yr ; ~ $0.5 mill/yr revenue) ecommerce stores ( <a href="http://smartflix.com" rel="nofollow">http://smartflix.com</a> and <a href="http://heavyink.com" rel="nofollow">http://heavyink.com</a> ) and I bought a few textbooks books on warehouse layout and design.<p>There really wasn't a lot in there that was applicable to me, but I bet that (a) the Amazon folks have all read these books, and (b) they could write much, much better ones if they wanted to spill some of their trade secrets!