Aviation Book Company closed September 30, 2014. You can order the same products Aviation Book carried from Aircraft Spruce. Aircraft Spruce & Specialty Co. has been the supplier that aircraft builders, owners, pilots, and aviation businesses have depended on since 1965. They carry a wide selection of aircraft parts, building materials, avionics, and pilot supplies. Aircraft Spruce supplies components for a wide variety of home-built aircraft including the Lancair, Vans Aircraft, and Cozy, as well as factory built parts for Cessna, Piper, Beech, and Mooney.