...enabling access to the text layer of electronic books has been made available on Accessible Google Book during July.

The facility, on the Google Accessible Search project, was launched by search engine company Google allowing users of assistive technologies such as screen readers, speech output and Braille display to read the available online books. For more information visit http://booksearch.blogspot.com/2007/07/greater-access-to-public-domain-works.html