Google's sending out a $5 coupon to all Android users who have yet to purchase a book from the Play Store, but there are a couple of caveats: the credit can only be used with books that cost more than five bucks — so you'll still need to pay something, even if it's only a few cents.

We've had a look through the different titles on offer and a few stood out, like A Game of Thrones: A Song of Ice and Fire, The Miracle of Dunkirk (you'll find this one particularly interesting if you enjoyed Christopher Nolan's latest movie, Dunkirkand Thirteen Reasons Why.

The promotion is only available in the U.S.

Now for the terms and conditions. According to Google, customers have up until August 31 to redeem the coupon within the Play Store application and only one coupon can be redeemed per user. The promotion is only available in the United States and credit is non-transferable.

Happy spending!