Isle of the Dead — Emily Rodda

An-ancient curse.
Seven mysterious dragons.
A race against time.

Aided by the mysterious magic of Deltora's last dragons, Lief, Barda, and Jasmine have found and destroyed two of the Four Sisters, evil Shadow Lord creations that have been poisoning Deltora. Now, aware that time is running out for the kingdom's starving people, the adventurers are racing to their next goal, on the wild west coast.

The Shadow Lord has become aware of their quest. And somehow he knows every move they make. Terrible dangers from the present and the past lie in wait for them. And the greatest shock of all lurks in the lair of the ferocious Kobb, on the desolate Isle of the Dead.