There have long been rumors that Google’s already formidable book library would be stepping up its game, becoming a full-fledged eBookstore. These rumors have come to fruition, as Google launched a cloud-based program with over three million titles available on day one.

The eBookstore is especially well designed for those using smartphones, since many of the features seem designed around Android and iPhone devices. Additionally, popular eReaders like the Nook or Sony Reader should be able to access all of the titles without issue.

The three million mark for available titles is more than just impressive — it makes them the industry leader right out of the gate. Each of these books cost an average of $12 or so, with exact prices varying. Google has gotten a lot more than those three million into a digital format, though, with a total of about fifteen million books having been put into electronic format since the project began in 2004. However, Google has stated that its only about ten percent of the way to its goal, with that goal being the digitization of all the world’s books.

The eBookstore’s cloud-based system means that you can access the book immediately after purchase, assuming you have a web connection. You can then download the book to your preferred device for later offline access.

While Google is selling many of the titles directly, they also want the framework to be open to any member of the American Booksellers Association, meaning that a number of independent retail book stores and promoters will be posting content here as well. Google stated that they wanted to keep the option of purchasing from independent stores open so that you could continue to support brick-and-mortar locations that serve across the U.S.