Just finished reading Protection and Reversal Magick by Jason Miller. Its one of the most thorough books on defense i have ever read and it is not a fluffy bunny work, but is meant for the practicing Occultist. He covers a wide variety topics:
-Daily Practices for Protection
-Protecting your Home
-Exorcism
-Using Spirit Guardians and Servitors
-Reversals and Counter Magick
-How to actually recognize your being attacked
i really enjoyed it and learned a lot even though i have read other books on psychic self-defense and was familiar with some of the material. I highly recommend it. Probably gonna buy the rest of his works.
My 2 cents, Peace