Safari Bookshelf
Safari Bookshelf is the premier electronic reference library for programmers and IT professionals.
Unlike an online bookstore, Safari lets subscribers:
Search Conduct searches across all of the technical books in the Safari library - thousands in all. Zero in on answers to time critical questions in a matter of seconds.
Read Read the books on your Bookshelf from cover to cover. Or, simply flip to the page you need.
Browse Browse books by category. With Safari researching any topic is a snap. From XML, to database to .Net, you'll find your answer in Safari.
Download Download chapters for viewing offline.
http://www.oreilly.co.jp/safari/