I am a bit, um, frugal, and Ramiel Nagel's book Cure Tooth Decay is well worth the price tag (and less expensive than a dentist visit!), lots of information, at least IMO. Looking at before and after photos of ALF, SOMA and other things are quite impressive (in some cases, folks' TMJ and migraines are either gone or lessened due to the lack of pressure on the skull bones!).