Thumb Score: +24

Amazon [amazon.com] has Murdoku: 80 Murder Mystery Logic Puzzles (Paperback) for $15.19 – $6.54 when you ‘clip’ the coupon on product page = $8.65.
Shipping is free with Prime or on $35+ orders.

Savings
Coupon price $8.65 (clip on the product page)

amazon.com/dp/1454961791 [amazon.com]