The HTML and XHTML Pocket Reference is a revised edition textbook authored by Jennifer Niederst Robbins. Published by O'Reilly Media, Incorporated in 2006, this pocket reference features a compact format with 108 pages, making it easy to carry around for quick reference. It covers the subject areas of programming languages, with a focus on HTML and XHTML, and is suitable for both general programming and HTML programming. The book is in English and is part of the Pocket Reference series by O'Reilly.