One on Remote Viewing called Remote Viewing Secrets by Joseph McMoneagle. The other is Astral Voyages by Dr. Bruce Goldberg . These are two I found really interesting. Another one that I've been reading over a period of time is Zen Buddhism In the 20th Century by Heinrich Dumoulin. A lot of these are older books because I would go into half price books and just see subjects that might be interesting. You would be amazed at what books you can find. I tried to get in to a book called Life Colors with a subtitle of The colors in your aura that reveal by Pamala Oslie but it was different from what I thought it would be. There was also another book on Astral Projection that I read by a wiccan, but I can't find it otherwise I would post it here. The Zen Buddhist book that I posted was really interesting because the guy took a lot of the hiku's or however they are spelled that is sort of like the buddhist poems that disciples compose on different thoughts or feelings.