The most useful introduction to alll aspects of mushroom cultivation is The mushroom cultivator by P. Stamets and J. Chilton, Agarikon press. I am sure that Paul will sell you a copy, his email is stamets1 at aol.com cheers! todell at u.washington.edu Dr. Thomas E. O'Dell, Ph.D. Dept. of Botany, Box 355325 University of Washington Seattle, WA, 98195-5325