Billie B Mysteries:Code Breakers

A slightly older Billie, her best friend, Jack, and other familiar friends from the original series, solve mysteries at school and in the neighborhood, using their smarts and common sense to get to the bottom of things. Billie and Jack find a mysterious note on Billie's front porch. It seems to be written in code! It's time the friends put their code-breaking skills to the test.