Today Apple is giving away Life of Pi by Yann Martel. 

You can download it to your iPad, iPhone or iPod touch here

Apple describes the book: "One boy, one boat, one tiger . . . After the tragic sinking of a cargo ship, a solitary lifeboat remains bobbing on the wild, blue Pacific. The only survivors from the wreck are a sixteen year-old boy named Pi, a hyena, a zebra (with a broken leg), a female orang-utan – and a 450-pound Royal Bengal tiger. The scene is set for one of the most extraordinary and best-loved works of fiction in recent years."

The giveaway may encourage people who haven't already to install iBooks, Apple's eBook reader software that helps the iPad compete with Amazon's Kindle.

For those people who don't have an iPad, iPhone or iPod touch, and therefore won't be able to read the eBook, Apple is giving away a free song 'You're electric' by Clare Maguire. The first time we clicked this link we were told that item doesn't exist in the UK store. The second time it worked though. This is Apple's free Single of the Week, rather than part of the 12 Days of Christmas promotion.

We also had issues downloading the eBook. Apple is not clear that it is necessary to download it on an iPad, iPhone, or iPod touch, rather than from your Mac. When attempting to download on a Mac you are diverted to a web page to download iBooks, but even once iBooks is downloaded you cannot download the file.

Over the next few days you can expect Apple to offer a range of free presents via the iTunes Store. Last year the company gave away games including Electronic Arts Trivial Pursuit and an episode of BBC TV show Outnumbered.

So far this year Apple has given away a Cheryl Cole song, music by Duran Duran, and an episode of Father Ted.

Apple promises a "fantastic" selection of songs, music videos, applications, books, TV episodes and a film will be free for 24 hours each day.

The offer runs from Boxing Day, 26 December 2010 until 6 January 2011.

Users can sign up to receive an Apple email alert for each free offer or download a dedicated 12 Days of Christmas iPhone application.

More details are available at iTunes.

Come back tomorrow to find out what Apple is giving away for free on the sixth day of Christmas.