The Boy Who Returned from the Sea — Clay Morgan

In the continuation of the popular The Boy Who Spoke Dog, Jack and his beloved dog, Moxie, are reunited on the island where they first met. Jack is not the only human on the island: the mysterious and dangerous Blackburn Jukes is there, too, searching for the valuable amber hidden in the bogs of the island. Moxie and Jack soon realize they must work together to protect themselves and their island from this intruder in an action-filled novel readers won't want to put down.