Beautifully produced and marvelously written, ""What's Happening in the Mathematical Sciences, Volume 3"", contains 10 articles on recent developments in the field. In an engaging, reader-friendly style, Barry Cipra explores topics ranging from Fermat's Last Theorem to Computational Fluid Dynamics. The volumes in this series highlight the many roles mathematics plays in the modern world. This volume includes articles on: a new mathematical method that's taking Wall Street by storm 'Ultra-parallel' supercomputing with DNA, and how a mathematician found the famous flaw in the Pentium chip. Unique in kind, and lively in style, ""What's Happening in the Mathematical Sciences, Volume 3"" is a delight to read and a valuable source of information.