Title: The secret of the puzzle box
Description: "The members of the Code Busters Club take a class trip to Angel Island--the Ellis Island of the West--where they discover a mysterious box with a connection to one of the Code Busters"--
Subjects: Mystery and detective stories, Code and cipher stories, Detective and mystery stories, Cryptography, Juvenile fiction, Ciphers, Fiction, Children's fiction, California, fiction
Places: Angel Island (Calif.)