TACK Secret Service Author:Marvin Miller, Nancy K. Robinson A "Can You Solve It?" book of short mysteries. T*A*C*K is a network of kids. We solve mysteries, everyday problems, and matters of life and death. Be a member of T*A*C*K . See if you can solve seven tricky cases - Operation Goldfish, The Locked House Mystery, The Case of the Haunted Dollhouse, and more!