by Jamie Yancey (Author), Alice Pescarin (Illustrator)
When something is disrupting the heart's normal rhythm, Emily and her team set out on a mission to uncover the cause before it's too late. To solve the mystery, Emily must shrink down and journey through the heart's chambers where she'll run tests, face unexpected challenges, and coax the mysterious Offbeat out of hiding. Will Emily and her team restore the heart's rhythm before chaos takes over?
