xslbook is an XSLT applet to display a book-style document in a Web browser that supports XSLT. xslbook transforms XML files created by users into HTML documents with an XSLT engine built in Web browsers. It can display HTML documents in Web browsers directly without other transformation tools. It has an automatic numbering function for chapters or block elements, an automatic generation function for table of contents and navigation links, a data operating function for other XML files, keyword search, and so on. It is a sub-project of xslet.