though I found the first one written a bit too "clinical" and why it took me months to finish it ;) The other two had a better writing style and by the third it was reading almost like fiction for what he was describing.
Also, way back before CDs, I took the cassette version of the Gateways program and loved it. I did achieve a partial willed OBE with the later tapes, but was kind of thwarted by the headphones. He does talk about EMFs in one of his books and how a faraday shield trapped him in one experiment, or kept him from getting out of the faraday-shielded room. So, that might have been the same case for me in a mild way.
I've been having spontaneous OBEs since I was 16 (32 years ago) though I haven't had many in the last few years. I don't know if I have evolved beyond the need for them or if I've lost some kind of interest in them (none that I'm conscious of! lol) I think the home course is effective, though the week-long course is worth it, too, partly because they have people there if you need them (like something "goes wrong" in some physical or mental way.) The course there also goes to a couple of higher levels than they allow to be reproduced on the home-series because of how 'high' one is taken. I think I've gone to those levels before, thanks to a friend pointing out a book that detailed the methods. I can't be abolutely sure about that, but it did have a definitely higher feel to it, so I know I got something additionally positive out of it.
You might also look up the books of Robert Peterson (
Out of Body Experiences and a second one I can't recall the title of.) Here's a couple of sites about the subject as well that are good for further research :)
http://web.archive.org/web/20071124031228/http://www.near-death.comhttp://www.astralpulse.com/forums