The Working Guide to Traditional Small-Boat Sails: A How-To Handbook
David Nichols' nice 8.5 x 11 book focuses on the lug sail, the gaff sail, the sliding gunter, the sprit sail, and more. Also included are marlinspike basics and tips on rigging. And there's information on how to retrofit a modern boat with a traditional sail. One of a few modern references on the topic, this 96-page book features many photographs and illustrations.