A new addition this modern classic series. Generations of readers have followed the adventures of lighthouse keeper Mr Grinling, his wife and their cat, Hamish, at the lighthouse. Mr Grinling has a puzzling mystery on his hands: someone is dumping rubbish into the sea! His nephew George thinks it could be pirates ... or could the culprit be someone closer to home?A charming new story in this beloved series, with an important conservation message.