Amazon

Promising review: "My wife and I worked through this case over the weekend and it took over our lives for a couple days. I was ready to give up but she refused to let an innocent man rot away in jail. Bless her soul, lol. We're probably not as clever as the typical mystery junkie because it took us the whole weekend but I'm proud to say we solved it without using any of the hints. Those 'aha' moments when you find the missing evidence are pretty dang cool. My wife was dancing around the kitchen table after we got the first one. It's too bad they don't have any more of these that I could find. Looks like this is the only case but I signed up to get notified when the next one comes out so we can have another mystery weekend." —J

Get it from Amazon for $29.99.