It's a pretty straightforward resource. It is hard to get your friends to peel off all their clothes and suspend themselves in midair, I will grant you that.
Also, it does not fill up half the book with those inevitable chapters telling the reader, "This is a pencil, you can draw with it and use an eraser, too. This is a watercolor brush..."
However, most of the poses in this book are unnatural poses of people making gestures I don't see in real life. A large majority of the images are of women, and skinny L.A. style women at that. (Interesting shave, there, missy.) Some of the photos are very, very dark and don't reveal anatomy at all. Also, they are very grainy. I don't know if this is a function of the film or the printing process (to keep the cost of printing an all-photo book down.)
I have to say, it was one of the better ones in the bookstore, but it leaves a good bit to be desired. It would have been nice if there were more males in it, the poses were more natural, and there were people of different sizes and (hello?) colors in there, too.
I have been using it to draw from, but all the flying in the air spreadeagle poses are not going to make it into my sketchbook. I think I will invest in a good magnifying glass and do some drawings from Muybridge's photo collections of people and animals in motion.