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When Brenda Laurel first wrote this book in the early '80s, it may have seemed a bit far-fetched to most computer users: "What? How can my interaction with a computer have anything to do with theatre? I'm typing!" But with the emergence of WebTV, VRML, and the dawning of real online interactivity where our interface with the computer and others is not the keyboard, but instead our imagination and the suspension of disbelief it requires, Laurel's ideas are finally coming of age. Snotty digerati might sniff that this is an old book, but I would argue that it is a book that has finally come of age.

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Programmers who specialize in PostScript, the page-description language, now have a newly updated reference guide for LanguageLevel 3. PostScript® Language Reference starts off with a bit of history on the language and an overview of the new version. It goes on to cover basic topics such as raster output devices, scan conversion, and page-description languages in general.

PostScript® Language Reference provides an overview of how to use the PostScript interpreter and understand the ideal structure of PostScript page descriptions. The book covers the heart of the language, including syntax, data types and objects, stacks, execution, basic operators, memory management, file input/output (I/O), functions, errors, and filtered-files and binary-encoding details. Subsequent chapters cover graphics, fonts, device control, rendering, and operators.

The appendices include a LanguageLevel feature summary, implementation limits, interpreter parameters, compatibility issues, character sets, encoding vectors, system-name encodings, and operator-usage guidelines. There's also a bibliography with additional reading recommendations. --Kathleen Caster

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Just as the Java 2 specification expands upon the solid foundation created by earlier versions of the Java language, The Java Class Libraries: Supplement for the Java 2 Platform builds on the base established by the highly respected The Java Class Libraries, Second Edition, Volume 1. This supplement covers all that's new and changed in the java.io, java.lang, java.lang.reflect, java.math, java.net, java.text, java.util, and java.util.zip packages, as well as the new java.util.jar and java.lang.ref packages in their entirety. Since this supplement covers only the new and modified material, you'll need to keep the older volume (whose contents are indexed in the Supplement for the Java 2 Platform, by the way) on hand.

The Supplement for the Java 2 Platform takes the form of a series of entries, each detailing the characteristics of a single class. Entries include a full statement of the class's inheritance, a full list of the members of the class (with flags next to those members that are new or have changed since Java 1.1), and detailed subentries on the flagged members. Members' subentries include a brief statement of the member's purpose and syntax, along with a prose description of the member's behavior. All members' subentries also include either an illustrative example or a reference to one that appears with another member. --David Wall