Sony - a million books are available for our e-readers

E-Ink-Info reports that Sony has now over a million public-domain books available in their e-reader store. Amazon has over 300,000 titles in their Kindle store, and Barnes & Nobles, which recently announced their own online bookstore, has over 700,000 titles, out of which more than 500,000 are public domain, also powered by the Google Books project.