Why do books appear as unavailable?

There are several reasons for a book to appear as unavailable to download.  The first most common reason is your Bookshare account is currently inactive.  Please select the Sign In link from the top of this page, log into your account and review the content on your My Bookshare page to ensure it's listed as active.

The second reason is the book is not available to your account type.  There are two reasons for this to happen: