The Mystery of Clanhammer Hall, at Woodcrest Military Academy, interested
Don and Jim Mercer and their friend Terry Mackson from the moment of their arrival at Woodcrest. But their curiosity about the old,
empty building faded into the back of their minds as they became involved in the mysterious disappearance of their headmaster,
Colonel Morrell, whom they had never seen. With initiative and ingenuity the Mercer boys, aided by Cadet Vench, did a little
detective work and uncovered a fantastic story of crime. An exciting story of adventure for modern boys.
