Here's a list of books on paper airplanes to get you started. Your local public library or school library will have resources on building paper airplanes--maybe even these!
Collins, John M. Fantastic Flight : Freestyle Fold and Fly Paper Airplanes / John M. Collins. Berkeley, Calif.: Ten Speed, 2004.
Hartelius, Margaret A. Zoom! : The Complete Paper Airplane Kit! / Written and Illustrated by Margaret A. Hartelius. New York: Grosset & Dunlap, 2003.
Mander, Jerry., George. Dippel, and Howard Luck Gossage. The Great International Paper Airplane Book / by Jerry Mander, George Dippel, and Howard Gossage. New York: Simon and Schuster, 1967.
Stillinger, Doug. The Klutz Book of Paper Airplanes / by Doug Stillinger. Palo Alto, CA: Klutz, 2004.