I think the chances of someone buying this book from the link provided is slim to none, so affiliate link or not doesn't really matter.
--learned something new about Amazon affiliate links. Thanks for the corrections guys!
Isn't the affiliate cookie a XX-day cookie? Place it now, and if I buy a completely unrelated book, you'll still get the commission? Because then it is valuable to place those links here.
The affiliate link will follow you and credit other purchasers to the affiliate