Heart of the Dragon

Deep in the jungle on the trail of her missing brother, Grace never expected to find a secret world populated by mythological monsters -- nor guarded by a sword-wielding being whose beauty put mortal men to shame.
Darius en Kragin belongs to a race of shape-shifting warriors sworn to guard Atlantis and kill all travelers who stray within its boundaries. Yet when Grace stumbles into his realm, he finds himself tempted to betray his centuries-old vow.