I must like Susan Wilson’s book, Weave Classic Crackle & More, because somehow I purchased it twice. It is, indeed, the best authority on the crackle weave that I know of. The copy that I am selling is a former library book that has a short break in the hard cover spine but the pages are unaffected. The author presents information covering looms with four shafts but 37 pages of the book concentrate on crackle for eight and more shafts. The price of this copy is $25, which includes media mail shipping in the US. I take only PayPal and I ship promptly. Thank you!