I've enjoyed reading both of Jeffrey's books. There is a sincerity and honesty that is presented in earnest for critics and colleagues alike. I have seen Jeffrey in person, on television and listened to his radio shows for many years..., IMO, his accuracy in retrieving information is unrivaled in all but the fewest of psychic circles.
I've hung-out with this guy. He is about as psychic as my cat is. Not very bright... repeats the same limited vocabulary over and over. Don't waste your time or money. He has NO more knowledge about any of this than You do.