William Gurstelle, one of my fellow MAKE boardmembers, has a new book out called Whoosh Boom Splat: The Garage Warrior’s Guide to Building Projectile Shooters. Highlights include the Jam Jar Jet (from MAKE Vol. 5), the Elastic Zip Cannon (a membrane-powered shooter), and a Da Vinci Architronito, a steam-powered cannon. Bill is also author of Backyard Ballistics and Adventures from the Technology Underground.
Here’s a link to the webpage for the book and Bill’s YouTube commercial for it.