The banner for the offer is on top of the page.
This might be a ymmv depending on your account (used before, etc.).
Valid for $5 credit towards the current store price of an ebook from eligible titles on Google Play. Credit may only be applied to eligible titles with an on store price greater than $5 before tax is imposed. Open to participants based on purchase history. Credit applied at checkout. Valid in United States only.
https://play.google.com/store/books
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