I don't read mysteries, but I think "Sherlock Holmes and The Adventure of The Speckled Band".I came to like the Sherlock Holmes series in the mystery unit. This one was the best because it had the most adventure out of the ones I read.

"Twas The Night Before Thanksgiving"

One day a kid gets home from school and he hears a scream and his dad runs to him from the kitchen. His dad grabs him and falls to reveal a 10" cooking knife buried in his back. The kid runs to the kitchen and sees no evidence anyone was there except his dad's blood trail...