what’s your fav book about spirituality/ the meaning of life?

EDIT: i’m also open to books about psychedelics

hi. i love to read and am wondering what your favorite book about spirituality/ life is. maybe a book i could find at my local books-a-million? or online. i’m not interested in anything about religion though. i’m doing ketamine iv therapy for my mental health and just rediscovered my passion for reading. i remember being a child and i LOVED to read books that i wanted to read. i hated when teachers forced us to read the most stupid books ever. haha sorry i got a little carried away but id like to know your fav book is that is spiritual and stuff. thanks ✌🏼also open to reading about psychedelics 👽

by Impossible_Quiet9777