WARNING (thanks to Spriggy) this may be a targetted offer. Check that you have the email (but hadn't read it) to confirm you will get the discount
Receive 10% off as a statement credit and complimentary worldwide delivery when you shop at BookDepository.com between 8 September and 8 October 2014 using your American Express® Card.
Fine Print:
- Limit of one statement credit per qualifying eligible Card Member.
- Statement credits are generally issued within 5 business days after your qualifying purchase, but may take up to 2 billing periods to post to your account.
- Offer excludes David Jones American Express Cards, American Express Business Cards, Corporate Cards and Cards not issued by American Express.
and of course I bought a book from there 5 days ago :P Good deal though!