There are terrific books you can find on the web for free :
Dive Into HTML5
Dive Into HTML5 seeks to elaborate on a hand-picked Selection of features from the HTML5 specification and other fine Standards. The final manuscript has been published on paper by O’Reilly, under the Google Press imprint
Getting real. The smarter faster easier way to build a successful web application
A book by 37signals. Here are the 16 chapters and 91 essays that make up the book.
Microsoft Application Architecture Guide, 2nd Edition
Microsoft Application Architecture Guide online book
Microsoft Enterprise Library 5.0 - Developer Guide
MSDN Magazine
10 years of MSDN Magazine is now easier than ever to explore! The new Silverlight Pivot Viewer allows you to filter through hundreds of articles and retrieve what you need in seconds.
patterns & practices - Windows Phone 7 Developer Guide
speckyboy.com : 12 Useful and Free Downloadable Web Design Books
speckyboy.com : 20 Useful Free PDF ebooks for Designers and Bloggers
speckyboy.com : 9 More Useful and Free Downloadable Web Design Books
stackoverflow.com : List of freely available programming books
The Web Book
The Web Book is a free 350-page book that tells you everything you need to know in order to create a home or business Web site from scratch. It covers everything from registering a domain name and renting some hosting space, to creating your first HTML pa
WikiBooks
The open-content textbooks collection that anyone can edit.
