Entangled Minds: Extrasensory Experiences in a Quantum Reality by Dean Radin is an excellent overview of PSI research. Radin summarizes these studies quite well and shows the reader why they convincingly negate the argument that “no evidence exists to support the idea of human ESP ability.” More importantly, Radin shows us that these abilities are not “extra” or “para” anything. They are just normal.
Also see Russell Targ’s newer book The Reality of ESP: A Physicist’s Proof of Psychic Abilities.