As an actual "Master Graphics" art dealer, dealing Picasso, Miro', Chagall etc. I found the book to be a great insight. Managing artist-dealer realtionships is the hardest aspect of being a great dealer, and is what made Vollard so huge!
The previous reader, read this book for the wrong reasons. It's not a handbook, nor intended to be one, on establishing you own business as an artist. You will not find any 'hidden secrets'. If you are an art dealer and want to have an insight as to the mastery of Vollard's ability to manage both the artist and the client, this is your book. If your a 'wannabe' great artist, then this 'capatilistic' point of view will not serve you at all.