Feel free to download these E-books.

They are full of best practices on usability and website design.  These books are for anyone involved in the creation or maintenance of web sites and an invaluable guide when trying to answer tough questions that come up in the process of designing, building, deploying and maintaining successful sites

Volume I ISBN 13: 978-0-9819446-0-9 10: 0-98194-460-4
Volume II ISBN 13: 978-0-9819446-1-6 10: 0-98194-461-2

http://get.adobe.com/reader/