Defending Your Castle by William Gurstelle is a book that discusses in detail the ways in which you can protect your castle – your house. There is no Attila and the Huns in the present time. Neither are there the Vikings or the Mongols. However, there are bad guys, trespassers, thugs, and thieves; and you need to protect your kingdom against them. The book presents some DIY ideas that can help you keep yourself and your family safe against bad or harmful entities. Step by step instructions and diagrams that show you how to build ancient artillery and fortifications.