Probably a bit boring for those not fascinated by studies on the abilities of the human mind. Especially when the studies can get pretty far out (e.g., hypnosis, telepathy). But I loved learning more about how science was trying to tackle psychic phenomena even back in '74.
I wouldn' be surprised if Tim Kring read this book. It could easily be the basis for "Activating Evolution." There's even an account of a man who regrew a lost limb.