Dark Day in the Deep Sea (Magic Tree House: Merlin Missions Book 11)

Eve of the Emperor Penguin (Magic Tree House Book 40)

Monday with a Mad Genius (Magic Tree House Book 38)

Moonlight on the Magic Flute (Magic Tree House Book 41)

Dragon of the Red Dawn (Magic Tree House Book 37)

A Good Night for Ghosts (Magic Tree House Book 42)