Celia Haddon was the Daily Telegraph pet agony aunt whose knowledgeable yet sentimental column delighted cat lovers. She has sold somewhere between one to two million books and is an author recognised by bookshops and the general public. Her manual One Hundred Ways for a Cat to Train Its Human has sold more than a quarter of a million copies so far and her One Hundred Secret Thoughts Cats have about their Humans has sold 147,000. Her first narrative book - Tilly: The Ugliest Cat in the Shelter - sold in excess of 18,000 copies in the UK Trade.A cat behaviour practitioner with the Centre of Applied Pet Ethology, she has a B.Sc. in applied animal behaviour.