Comprehensive book that explains very well what the purification and ways to purify a body, a place or an object. I keep this book in my library for my "culture". But purification practices question is widely read complex than I thought. For example, I thought that it was enough to put a big bowl of salt under a bed to purify a room but you have to heat the salt before! ... to purify salt. And so this is how "cool" a little neophyte. This book is very serious and interesting but does not grow to practice by complex protocols. scoufi