The dragon with a chocolate heart
(Junior Book)

Aventurine is the fiercest, bravest kind of dragon, and she's ready to prove it to her family by leaving the safety of their mountain cave and capturing the most dangerous prey of all: a human. But when the human she captures tricks her into drinking enchanted hot chocolate, she finds herself transformed into a puny human girl with tiny blunt teeth, no fire, and not one single claw. She's still the fiercest creature in these mountains though - and now she's found her true passion: chocolate!