Apple has released iBooks, its e-book-reader software, and the iBookstore e-book shop for iPhone and iPod Touch users.
The new e-book reader application, announced at Apple's World Wide Developers Conference (WWDC) earlier this month, has come as a part of Apple's latest mobile operating system, iOS 4.
The e-book service, earlier only available to iPad users, is Apple's attempt to enter the lucrative e-book market, and gives its iPod Touch and iPhone devices an edge over their competition.
According to Steve Jobs, sales of e-books has increased by 22 per cent since the release of the iPad.
The new release is set to challenge r e-book selling rivals Amazon, whose Kindle and online Kindle bookstore have a strong foothold in the market.
iBooks reader version 1.1 allows users to synchronise files between Apple's iPad, iPhone, and iPod Touch.
The application also comes with the latest updates, including PDF support, a better range of fonts and enhanced options for page formatting.