Hypertext Markup Language, or HTML, is the programming language that lets pages be viewed the same way on any computer. Whether or not you write your own code when designing your family history site, it's a good idea to get a basic understanding of how the language works. Here are some resources to get you started:
Books on HTML
Complete Idiot's Guide to Creating an HTML Web Page by Paul McFedries (Que, $16.99)
Creating Web Pages with HTML Simplified by Ruth Maran (IDG Books, $24.99)
HTML for Dummies by Ed Tittel and Steven N. James (IDG Books, $24.99)
HTML: The Complete Reference by Thomas A. Powell (Osborne McGraw Hill, $39.99)
Learn HTML in a Weekend by Steven E. Callihan (Prima Publishing, $24.99)
Web sites about HTML
Books on Web Site Construction
Publishing Your Family History on the Internet by Richard S. Wilson (Compuology, $19.99)
Web Publishing for Genealogy by Peter Christian (Genealogical Publishing Co., $10.95)
Genealogy Online for Dummies by Matt L. and April Leigh Helm (IDG Books, $24.99)
Creating Web Pages for Dummies by Bud E. Smith, Arthur Bebak and Kevin Werbach (IDG Books, $24.99)