Proleptic, Inc. specializing in providing information to manufacturers of leather products, leather working professionals, and retailers of equestrian products. Additionally, we carry manuals for a diverse assortment of commercial sewing machines (harness and saddle stitchers) such as Adler, Ferdco, Ferdinand, Campbell, Randall, Union Lock, Juki, Champion, Singer, Consew, and Landis. Available for purchase are leatherworking books, leatherworking tools, and thermal tools. We publish a monthly trade magazine, Shop Talk!, as well as the New Big Book, an annual buyer's guide.