Tiger's Blood: The Tiger's Apprentice, Book Two

Ever since Tom became the apprentice to Mr. Hu, the Guardian of the phoenix egg, his life has been a whirlwind. Now Mr. Hu is weak after saving Tom's life in battle, and the two must flee with their motley crew of friends to the dragon kingdom, far below the ocean's surface. While Tom waits for Mr. Hu to recover, he realizes that even the dragons cannot promise safety. And as an unstoppable evil advances, Tom must find the strength within to protect the egg by himself.