THIS IS ONLY AVAILABLE FOR FREE DOWNLOAD for Australia, Canada, and US regions. Unfortunately, it is NOT FREE but with a discounted price of $2 each for Asia & the Pacific, including MiddleEast and Africa.
Please note that due to copyright restrictions, the registration status of Amazon Kindle and its current location (while travelling/in transit) are the basis for free downloads. For instance, if you are travelling from elsewhere to United Kingdom (UK) with your Kindle, you cannot purchase thru Amazon.co.uk but you can use the Amazon.com, otherwise you change your Amazon account previous location to current address or transfer your Kindle registration/account to Amazon.co.uk.
However, even if you did not change your Kindle registration status, and your Kindle (being detected thru wireless connection) is outside these regions, you can not avail the free download from Amazon.com. In other words, both the account registration and the location of the Kindle should be the same region to avail these freebies, but sometimes freebies are available both in UK and US regions from Amazon.com and can be downloaded without any fuss, ONLY if your Kindle is registered in the US.