Not filled with with obtuse mathematics and difficult proofs, MWSS:Data Structures and Algorithms in Java removes the mystique from DS&A. It does this in two ways. First, the text is written in a straightforward style, making it accessible to anyone. Second, unique new Java demonstration programs, called ''Workshop Applets,'' are provided with the book. These Workshop Applets provide interactive ''moving pictures'' which the user can control and modify by pressing buttons. The book's text describes specific operations the user can carry out with these Workshop Applets, and the applets then reveal the inner workings of an algorithm or data structure.