For over 50 years, generations of 9- to 12-year-olds have thrilled to the faith-building adventures of these courageous Christian boys. Now your kids can enjoy the legendary escapades! Includes Tree House Mystery, The Cemetery Vandals, The Battle of the Bees, Locked in the Attic, Runaway Rescue, and The Case of the Missing Calf. Approx. 140 pages each, softcovers from Moody.