In particular the book introduces several very interesting exercises to develop skills and ideas of portraiture and what it means in the context of modern art. I must admit, however, that many of the exercises would need a subject with great patience and tolerance as several need hours with a model doing very little to work.
Another stroke of luck recently was finding a copy of "Brassai Paris" for 10 Euro in a museum book shop,
I wish all photo books were so well priced, especially one as well produced as this. This contains some superb street as well as more formally posed photography showing the people and city of Paris in the 30's and 50's.