All you have to do is sign in and add titles to your 'Bookshelf'. Once they're on your 'Bookshelf', your options will be displayed and, if available, you can click the 'Read' button to read a book right in your browser.
Right now we have 1000+ OverDrive Read titles available...take a look at: http://hdsb.lib.overdrive.com/AllOverDriveRead.htm or use the 'Collections' menu at the top of the page and select 'READ Collection'.
This new feature makes use of web technologies such as HTML 5 and CSS 3, which are not supported by some versions of Internet Explorer. If you are an IE 7 user, you will be prompted to complete a one-time install of the Google Chrome Frame plug-in. The plug-in is free and only takes a few seconds to install. If you prefer not to install the plug-in, you may want to switch to another browser such as Firefox, Chrome, or Safari.
Enjoy!