Cows in Action - The Battle for Christmoos by Steve Cole
Red Fox ISBN 9781862305397
Genius cow Professor McMoo and his trusty sidekicks, Pat and Bo Vine, are star agents of the CIA - Cows In Action. They travel through time, fighting evil bulls from the future and keeping history on the right track.... A festive booby-trap sends McMoo, Pat and Bo back to Christmas, 1066. The Battle of Hay-stings may be over, but the Battle for Christmoos is just beginning - and the whole of history hangs in the balance. It's time for action!