Secret of the Dragon (Dragon Riders of Elantia, #6)

When Zara and Lessie finally escape the Hellmouth, the last thing they expect is to wake up in Muza's hidden lair. There, they stumble into an impossible secret that just might be the key to defeating their enemies, reclaiming their home, and freeing the dragons from the dragon-rider slavery bond once and for all.
 
But the Dragon God, thwarted from regaining his true form, is out for revenge. And if Zara and Lessie are not careful, they may end up being swallowed by his mighty shadow after all...
 
Join Zara and Lessie on their final adventure!