Book excerpt: With terrorist groups expanding their weapons of destruction beyond bombs and bullets, chemical and biological warfare agents aren't merely limited to the battlefield anymore. In some cases, they are now being used on a new front: major metropolitan cities. And in the Handbook of Chemical and Biological Warfare Agents, emergency response personnel-from HazMat and Police SWAT teams to Explosive Ordinance Disposal units-will find a myriad of information on how to deal with such incidents involving dangerous chemical and biological agents. The 504-page book is formatted into a series of indices developed to facilitate rapid access to key information on chemical, biological and toxin agents, with each index cross-referenced to all others. The wealth of data not only include the physical appearance, odor, signs and symptoms of dangerous materials such as nerve agents and vesicants, but the detection and removal of such agents and the treatment of victims. Author D. Hank Ellison, a former U.S. Environmental Protection Agency emergency responder and officer in the Chemical Corps who provides chemical and biological counterterrorism training to HazMat, Police SWAT and Explosive Ordinance Disposal teams, also includes a litany of guidelines from such sources as the US Army, DOT and other agencies.