Well, Bandler-Grinder's stuff was among the best. Have you read Tranceformations? I assume you read Frogs into Princes. Robert Dilts is also excellent. Check his site at: nlpu.com Also, Tad James has great Practitioner and Master Prac courses on tape. I don't know how advanced you are in the subject, and for what purposes you're studying, so not sure what kinds of materials you'd be interested in. I'd read anything by Milton H. Erickson for the hypno side. I had a tape of his… whew… couldn't listen for more than a few minutes. Good luck!