The Dragon with a Chocolate Heart
The first book in the Dragon Heart series.
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! All she has to do is walk on two feet to the human city, find herself an apprenticeship (whatever that is) in a chocolate house (which sounds delicious), and she'll be conquering new territory in no time... won't she?
Wild and reckless young Aventurine will bring havoc to the human city - but what she doesn't expect is that she'll find real friendship there too, along with betrayal, deception, scrumptious chocolate and a startling new understanding of what it means to be a human (and a dragon).