Brings together previously published work by the author over the past four years, plus new work, on a radical new particle theory of tachyons, particles existing in subatomic structures that travel faster than the speed of light. Wall's tachyon model describes electrons, muons, mesons, and light nuclei, and includes detailed calculations of particle energy levels, dimensions, and magnetic characteristics. He compares the present model with other particle models, and comments on early tachyon theories. For scientists and engineers, and students in the physical sciences. Annotation copyright Book News, Inc. Portland, Or.