Notes

183 pages : illustrations, map.
Summary: The Code Busters (including new fifth member Mika) go on a class trip to Angel Island, known as the Ellis Island of the West. While there, they come across secret messages--and a hidden box--that Mika's ancestor left at the immigration station decades ago. The solving of mysteries in this series is interactive, and each book invites readers to work alongside the characters to break a variety of codes. Solutions are included at the end of the book. (Books in Print)