The 2004 edition of the annual volume consists of 15 contributions that review recent progress in the study of dark matter, gravitational wave astronomy, nucleon structure, quantum chromodynamics, the heaviest nuclei, and the muon's magnetic moment. The longest paper reports on residual background sources encountered in experiments conducted deep underground. Other specific topics include the solar hep process, tracing noble gas radionuclides in the environment, heavy quarks on the lattice, and the physics motivations for building a high energy electron-positron linear collider. No subject index is provided. Annotation ©2004 Book News, Inc., Portland, OR