Amazon is to include embedded audio and video in its Kindle books - but not for those that use its own hardware.
The update is only available for those using the iPad, iPhone and iPod touch. It indicates that Amazon has decided to focus on books and software, rather than the hardware device.
"We are excited to add this functionality to Kindle for iPad and Kindle for iPhone and iPod touch," says said Dorothy Nicholls, director of Amazon Kindle.
"Readers will already find some Kindle Editions with audio/video clips in the Kindle Store today - from Rose's Heavenly Cakes with video tips on preparing the perfect cake, to Bird Songs with audio clips that relate the songs and calls to the birds' appearances. This is just the beginning - we look forward to seeing what authors and publishers create for Kindle customers using the new functionality of the Kindle apps."
The features has been developed in conjunction with Wiley. The first dozen books to be made available include Rick Steves' travel guides, Together We Cannot Fail by Terry Golway - and Knitting for Dummies. They're available in the Kindle Store.
"Innovations like these represent the advantages that digital can offer," said Peter Balis, Wiley's director of digital content sales. "Advancing our content in this manner is important for our authors and our readers and it will raise the bar on what digital reading can offer for years to come."