Don’t know if any of these books are worth the hassle but here’s a link to a page with all the books you can use this credit towards.
To claim your $3 eBook credit, please sign in or create an account.
Credit must be used on an eBook on the deal page.
Credit must be claimed and used by 11:59 PM PDT on March 31, 2018.
You can read your eBook on a Kindle e-reader or Fire tablet, or any device with the free Kindle App.
Claim coupon:
https://smile.amazon.co