As of April 2007, all of her books have been published through Peachpit Press.All of Castro's current books follow the style of a 'Visual Quickstart Guide' or 'Visual Quickproject Guide'.

HTML

• HTML for the World Wide Web (1996)
• HTML for the World Wide Web, Second Edition
• HTML for the World Wide Web, Third Edition
• HTML 4 for the World Wide Web, Fourth Edition (1999)
• HTML for the World Wide Web with XHTML and CSS, Fifth Edition (480 pages, September 27, 2002) ISBN 0321130073
• HTML, XHTML, and CSS, Sixth Edition (456 pages, August 16, 2006) ISBN 0321430840

Other works

• Faxivisa (1992) ISBN 8488004087
• Perl and CGI for the World Wide Web (272 pages, November 12, 1998) ISBN 020135358X
• XML for the World Wide Web (269 pages, October 1, 2000) ISBN 0201710986
• Perl and CGI for the World Wide Web, Second Edition (336 pages, May 29, 2001) ISBN 0201735687
• Creating a Web Page with HTML (144 pages, August 3, 2004) ISBN 032127847X
• Publishing a Blog with Blogger (144 pages, January 27, 2005) ISBN 0321321235
• Creating a Photo Book and Slideshow with iPhoto 5 (160 pages, June 19, 2005) ISBN 0321357523

Visual QuickStart QuickProject Guides

The Visual approach is intended to aid and quicken learning in order to allow the reader to begin using what they've learned quickly.

In an example piece of code, information relevant to the new technique or method being learned is highlighted to make it stand out and easier to locate, while still retaining the context in which the highlighted-text lies.

A brief caption to describe the example is given underneath then an image is presented to demonstrate the end result of the whole example.