Hi,
Check out PolySail International
http://www.polysail.com/
on how to build poly tarp sails. Dave Gray sells very nice kits that are cheap prices. He moved from IN to FL and his site isn't completely up and running yet, but he has free sail plans and lots of instructions. I built the jib from his plans in my avatar and my own design main sail in the picture from one $65 kit and still have poly tarp left over. Besides mine being taped I also sewed mine but they say just taping can last a couple of years or better. You wouldn't want the sail below but a lower sail so as not to flip you over unless you use pontoons as I do.
I also have the Todd E. Bradshaw book "Canoe Rig-the essence and the Art" that I got from Amazon.com. I found the book at about half price from one of the Amazon side sellers in new condition. It is a very beautiful book with great art work and pictures.
John
