- EbookBackyard BallisticsWilliam Gurstelle
- EbookDefending Your CastleWilliam Gurstelle
- EbookThe Art of the CatapultWilliam Gurstelle
- EbookThe Art of the CatapultWilliam Gurstelle
- EbookAbsinthe & FlamethrowersWilliam Gurstelle
- EbookPractical PyromaniacWilliam Gurstelle
- EbookWhoosh Boom SplatWilliam Gurstelle
- EbookReady the Cannons!William Gurstelle