<book> Stanislav Grof. Which one?

[EmptinessDncing]

I'd like to do a bit of reading from Stanislav Grof because I'm considering doing a Transpersonal Counselling course.  So I'm really looking for a text book.  Any recommendations? 

I haven't bought Leo's book list yet, so if this has advice regarding this, forgive me for asking. I'm happy to donate. 

[Sri McDonald Trump Maharaj]

I can recommend LSD: Doorway To The Numinous which I liked but I haven't read anything else from him.  

[Dizzy]

@EmptinessDncing  My favorite one is When the Impossible Happens    wonderful work of over 50 years of research and self-exploration is reported on this book  and 2#  The adventure of self discovery 

If you read let me know your thoughts about it =)  I am a big fan of his work and started joining the Holotrophic breathwork workshop after reading his books =)