An outstanding one-- but extremely hard to find-- is Disneyland: The Nickel Tour (2nd edition). It's a complete history of the park up through the year 2000, and the level of detail in it is amazing. It's beautifully bound and printed; it looks for all the world like an academic textbook about DL. I just picked up a used copy on eBay and am thoroughly enjoying it. It is QUITE spendy, though, because there were only a few thousand printed and it's been out of print for quite some time.