The proceedings of the December 2003 presents results on the synthesis of various energetic and reactive nanomaterials, such as organic crystals, intermetallic-forming metal alloys, thermite type metal-oxide mixtures, and sol-gel nanocomposites. The 39 contributions apply ab initio equation of state calculations to new energetic structures, examine fundamental mechanisms based on shear-inducing reaction initiation or through hot-spots, and measure the reactivity of nanoenergetic materials systems. Other topics include the characterization of nano-sized particles for propulsion applications, the underwater explosive behavior of compositions containing nanometric aluminum powder, and the effects of very small particle size on safety properties. Annotation 2004 Book News, Inc., Portland, OR