Master of the Phantom Isle: Dragonwatch, Book 3

Seth joins the darkside in this third Dragonwatch book. A "dark unicorn" took him away and has him continue to run errands to support the undead and other dark creatures. Seth has lost his memories and is not sure who is telling the truth. He feels it is bad to have people imprisoned, so helps free the creatures and run other errands for the dark.

Meanwhile Kendra and others are working to free him and save the world. The satyrs continue to provide comic relief as they help out. On their adventures, they explore one of the most elaborate tree-house systems around. They also work on digging out a treasure while defending themselves from sea monsters. (There is a ship that gives somebody the power to control sand. This helps protect them from the enemies as well as bring up the treasure.) Later they use a potion to walk in the water at the bottom of the ocean as if it were land. The adventures continue to get more wild during this middle book.