New edition of a text providing a clear presentation of principles and methods for performing the ever-more-important tasks of shrinking and expanding--written for nonspecialists who have background in the use and operation of computers but are glad to have the math kept to a minimum. Numerous examples and exercises complement the material (answers at the website). Coverage includes basic techniques, statistical, dictionary, and wavelet methods; image, video, and audio compression; and other methods (e.g. the Burrows-Wheeler, symbol ranking, sort-based context similarity, sparse strings, and dynamic Markov coding, among others). The new edition adds chapters and fixes mistakes. Salomon is affiliated with the department of computer science at California State University, Northridge