Land of Deep Shadows, book 3: Chase the Wind
Pat Hynes1997

What is the meaning of the dreaded word Claydermass? Does the strange symbol of circle and lightning offer any clues? What is happening to the leverets and what has it to do with the Tenth full moon? Together with Dilla, Jacko, Drimna and Packo the Purveyor, Crust the hare undertakes an epic journey across the land -- a journey fraught with danger on all sides but which offers their only hope before the events of the full moon seal their fate. Wildlife drama and fantasy combine to create an engrossing tale of danger and destiny in the tradition of Watership Down.