Came through the thrift shop so I took home to read. I should note it was written in 1951, so "New" is a relative term, still much has stayed the same while a great deal has changed.
Of interest in it was the consideration given Mesmer, electricity, the idea of "Animal Magnetism", ideas on volition and personal autonomy, and the chapter on language foreshadows Bandler & Grinder "Frogs into Princes".
Worthwhile, if a bit dated, but if you don't know where we've come from you can't know where we're going.