Tangentially related and perhaps of interest to some readers of this thread, though not a prize submission comment:
My nomination for the “three books” for psychedelic therapy would be
The “Why” Book: Pollan’s How to Change Your Mind
The “What” Book: MAPS’s A Manual for MDMA-Assisted Psychotherapy in the Treatment of PTSD (alternatives would be this treatment protocol from Phase 2 MDMA trials and Grof’s LSD Psychotherapy)
The “How” Book: R. Coleman’s Psychedelic Psychotherapy: A User-friendly Guide for Psychedelic Drug-assisted Psychotherapy (the runner up would be Fadiman’s The Psychedelic Explorer’s Guide)
For anyone worried their comment won’t get attention vs the existing ones, I’m enjoying this thread and am watching for and voting where relevant on new ones, FYI.