Edward Stratemeyer 
Mystery at Putnam Hall 
Or, The School Chums’ Strange Discovery

An offshoot of Edward Stratemeyer’s abidingly popular Rover Boys series, The Mystery of Putnam Hall focuses on friends of the famous trio of brothers. When a shady character begins to hang around the venerable military boarding school Putnam Hall, a group of intrepid young detectives works together to put a stop to the strange goings-on before it’s too late.