Google has now introduced the mobile version of its Google Book Search project. The original version offered scanned images of each page in a book, which were difficult to read on a mobile screen. As a result, the company digitized the text to recognize each letter so each word could be displayed in sequence, regardless of the screen size.

More than 500,000 books that aren’t protected by copyright are now available to users of devices such as Android phones or the iPhone. U.S. users will be able to access one million additional titles. That’s because copyright laws vary from country to country.

Although currently viewing the service requires an Internet connection, the company plans to make the books available offline in the near future. Online book retailer Amazon has alsov indicated that it has plans to make books for its e-book reader, Kindle, available to cellular phone users, but did not state when.