Psilocybin, Magic Mushroom Grower's Guide: A Handbook for Psilocybin Enthusiasts By O. T Oss, O N Oeric Books / Paperback Crafts & Hobbies › Hobbies ISBN: 0915904136 / Publisher: And/Or Press, January 1976 Price $100.98 Free Shipping Send to a friend Used - Good Good condition. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. $100.98 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.