There's a school of therapy/psychology that has a rigourous epistemological basis and gets repeatable results. (I.e. an algorithm for eliminating phobias that works quickly and reliably with durable change.) This school gets panned for not being scientific, and I have to admit that that's not undeserved, however, as I said, the underlying conceptual structure is solid and the results are repeatable. I myself was cured of a deep and lifelong depression in a single session of hypnosis by one of the co-founders of this school. So not only can I vouch for its conceptual integrity, I can also vouch for its dramatic efficacy. (This isn't "my cousin", or "some guy I heard about", it was me. I lived the anecdote.)
FWIW, some books. "Structure of Magic" I & II are the first two books and are a good place to start from to see the origins of the latter work. TRANCE-Formations is a rich text on theraputic hypnosis. And then there's the Core Transformation Process, an algorithm for profound spiritual growth.
https://www.goodreads.com/book/show/964154.The_Structure_of_...
https://www.goodreads.com/book/show/821993.The_Structure_of_...
https://www.goodreads.com/book/show/956297.Trance_Formations
https://www.goodreads.com/book/show/369813.Core_Transformati...