Save on Magic Tree House Boxed Set, Books 1-4: Dinosaurs Before Dark, The Knight at Dawn, Mummies in the Morning, and Pirates Past Noon with a Amazon promo code

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 Magic Tree House Boxed Set, Books 1-4: Dinosaurs Before Dark, The Knight at Dawn, Mummies in the Morning, and Pirates Past Noon.