The Lost Treasure of Grandpa Jingle-Wingle

Imagine a pair of bumbling bank robbers, a trio of kidnapped eighth-grade bullies, a lost treasure of gold coins, and a newly discovered system of underground caves, tunnels, and narrow ledges.
These are just some of the encounters that sixth graders Albert McKavitt and Ben Crawford face in The Lost Treasure of Grandpa Jingle-Wingle. And it all begins after a single gold coin is found in the abandoned house of an old crusty miser who, along with his treasure, disappeared many years ago.
When Albert and Ben realize a kidnapping has occurred, they decide to follow the careless trail of footprints stamped into the muddy bank of a small meandering creek. The trail leads them to the entrance of a vast, seemingly endless, underground maze.
With only a single flashlight growing dimmer with each passing minute, Albert and Ben trek deep into the darkness, searching for the three captive eighth graders. But what they find, besides the shriveled-up remains of poor old Grandpa Jingle-Wingle, is the adventure of a lifetime.