What's your favorite book about chess that isn't an instruction guide?  Something about the history or a certain player etc.

Kasparov put out a 5 volume set entitled "My Great Predecessors"

I found it to be an interesting set of books. 

My favorite is "Secrets of Grandmaster Play" by Nunn & Griffiths.  Maybe the best annotated game collection for the average player.

For me, It has to be The Oxford Companion to Chess.

The Chess Companion

I have uninstructional books about chess. Come and take the damn things. (actually one is good, "The Complete Book of Chess," although like the others it has a completely misleading title to stimulate sales to saps like me)