let me just mention that TRANQUILITY WITHOUT PILLS: all about Transcendental Meditation by Jhan Robbins and David Fisher (1972) is a thinly-disguised advertisement for TM and has not much of anything with practical application.
Oh, it talks (vaguely) about what happens in classes. It has testimonials from happy campers. It also has "do not do this at home alone" sorts of warnings and "come in for your free first sessions" come-ons and "you really need to get the Real Authorized training or don't even bother" notes.
Don't bother reading it if you're looking for any substance.