I'm very pleased to hear Aperture are bringing out a new book in their 'Workshop' series. No ETA yet but it's going to by 'Portraits and the moment' by Mary Ellen Mark.
The majority of the books I buy are monographs rather than how to" books but Aperture have begun to release a series of books on a wide variety of topics written by authoritative photographers and are priced at a level that makes them a very attractive purchase.
So far there have been three in the series and more are promised. All are immensely readable and a good size at around 125 pages a piece. Chock full of full page photos to illustrate the points being made and at a good price i'd thoroughly recommend you pick up the set.