The Seeing Ear is a charity that provides a free online library of books in digital format, for people with a print disability in the UK.
There are over 4,000 titles available on the Seeing Ear, in Plain Text, Microsoft Word or PDF format. Most of the books are novels or reading books but there are increasing numbers of textbooks as well. They have the World Book Day books (apart from "Where's Wally") available to download.
For more information on how to join: http://www.seeingear.org/library/join