While not strictly piratical nonetheless let's remember that pirates were sailors and that as such knowledge of all things maritime would behoove everyone one of us. This book just came into the library and it seemed a good one to read for all of us.
"To Harness the Wind: A Short History of the Development of Sails" by Leo Block Naval Institute press, 2003 ISBN 1557502099
Cover the History of sails from the first depiction of one (Egyptian vase 6000 B.C.E,) to modern racing sails. The book also touches on Chinese & South Pacific sails.
I am going to have it charged out to me after it's cataloged.
Looks like a interesting read.