Google has announced it would begin selling electronic versions of new books online later this year, in a direct challenge to Amazon.

Google has limited full downloads to books out of copyright, and only snippets are available from copyrighted books, but it has led to a brawl over who has the right to digitise a book: the author? The traditional publisher? Or anyone?

Under the settlement Google agreed to establish an independent "Book Rights Registry" which will provide revenue from sales and advertising to authors and publishers who agree to digitise their books. Publishers and authors are now in the process of opting in or out of the Google settlement.