I went to the site; I didn't see where to sign up, but maybe that's because I didn't request a book; however, reading what's posted on the site, it appears to me to be a reincarnation of Gutenberg; I started my volunteer work by editing (we were to edit, not just proofread) for them; I scanned a book that they wouldn't take because it was too new, and they referred me to Bookshare.org; that's how I got started at bookshare; and the site does (at least Gutenberg did) work very nicely on a Mac. I read the whole of Darwin's Voyage of Th Beagle and Jules Verne's "Voyage to the Moon" ( on Gutenberg; I also used a book from it (a very old mystery) to validate a bookshare book (no other copy was available; You might be interested in reading Voyage To the Moon; the launch site was what is now Cape Canaveral--the site whence we launch our spaceships to explore Mars, the moon, etc. Verne's science fiction became reality smile