A Billie B. Mystery
code breakers
sally rippin * Aki fukuoka
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Billie B. Brown and her friends, Jack, Mika and Alex, have decided to start a Secret Mystery Club and scour the neighborhood looking for mysteries to solve and clues to uncover.
 
In Code Breakers, Billie and Jack find an anonymous note on Billie’s front porch. It's time the friends put their code-breaking skills to the test.