If the eBook is broken on Kindle, then it'll be up to the publisher (Riverhead Books) to fix it, not Amazon. Though as the bookseller Amazon should (in theory)

If the eBook is broken on Kindle, then it'll be up to the publisher (Riverhead Books) to fix it, not Amazon. Though as the bookseller Amazon should (in theory) offer refunds to people who bought the defective eBook?