I was reading the book called Dragon Keeper, I finished this book about a day ago.
This book starts out with a orphan slave, that has to feed the dragons in a large dark pit.
When she was feeding the dragons she found one of them dead, So now out of the 12 imperial dragons only one remains.
Later in the book the emperor sells the last dragon to a dragon hunter named Diao. The Orphan helps the dragon and the dragon stone get away.
After this incident you find out the girls name (Ping) and the Dragons name (Long Danzi).
Ping has become the New Dragon Keeper and both Danzi and Ping set off for the ocean.......... They do have some issues on the way though.