This book started my obsession with art. I've read 5 books by Henri Perruchot about impressionist and post-impressionist artists, and this one is the best of all. Perruchot book usually very informative, but not too emotional, but this one has both qualities to it. Besides biography of Lautrec it shows life of struggling late nineteen century "bohema" and night life of famous Montmartre and different cabarets, e.g. Moulin Rouge, etc.
The version that I read contained color inserts of Lautrek lithographs, which really helped during the reading, because I wasn't very familiar with artist's work at that time. I highly recommend it.