The secret of the puzzle box

By Penny Warner

Subjects: Mystery and detective stories, California, fiction, Fiction, Children's fiction, Ciphers, Cryptography, Juvenile fiction, Code and cipher stories, Detective and mystery stories

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"--