Bodyhammer: Tactics and Self-Defense for the Modern Protester by sarin, also known as the ShieldBook is a great book on the construction of shields for a protest. It also covers other forms of “passive armaments”, such as body armor, and tactics in engaging the police. This is version 1.1. The original can be found at sarin’s section of the the devo art network website. To quote sarin:
“Bodyhammer: Tactics and Self-Defence For the Modern Protester” is a booklet detailing means by which protesters can reclaim the freedom of movement and assembly through self-defence and protection.