Checkmate is a savings app with over one million users that have saved $$$ on brands like Amazon.
The Checkmate extension automatically applies Amazon discount codes, Amazon coupons and more to give you discounts on products like Cracking the Coding Interview: 189 Programming Questions and Solutions (Cracking the Interview & Career).
Checkmate users have also been loving these products from Amazon.
Users have been saving products like this to their collections.