Below is a list of some the resources I have found particularly useful and/or interesting on my path to becoming a hypnotherapist:
My Voice Will Go With You: The Teaching Tales of Milton H. Erickson, edited and with commentary by Sydney Rosen.
Trance-formations: Neurolinguistic Programming and the Structure of Hypnosis, by Richard Bandler and John Grinder, edited by Connirae Andreas.
The Language of Changeby Paul Watzlawick.
Hypnotic Realities: The Induction of Clinical Hypnosis and Forms of Indirect Suggestion, by Milton H. Erickson, Ernest L. Rossi and Sheila I. Rossi.
The Collected Papers of Milton H. Erickson Volumes 1-4, by Milton H. Erickson and Ernest L. Rossi.
The February Man, by Milton H. Erickson & Ernest L. Rossi
Hypnotherapy, by Milton H. Erickson & Ernest L. Rossi
Change, by Paul Watzlawick
Mindfulness for Beginners, by Jon Kabat Zinn
Fundamentals of Ericksonian Hypnosis I, a training video produced by The Milton H. Erickson Foundation 
The Artistry of Milton H. Erickson,  includes an exposition of Erickson’s work by Dr Herbert Lustig MD