The Riverbank Box Crooked Branch Mysteries Book 1 by Tricia Cundiff

A secret treehouse close to the riverbank gives Carson and Luke a great view and leads to an adventure filled with danger and mystery.

Finding the locked box buried in tree roots was luck, but the boys would need more than luck to avoid the men that wanted it.

★A strange old man hidden in shadows makes his presence known in the spookiest of places, the local cemetery. Friend or enemy?