John Hoyle, ACE and John Scarne are all renowned experts in the field of cards. Hoyle is known for his eponymous book, 'Hoyle's Rules of Games', which is a comprehensive guide to card games. ACE is a professional card player and magician who has won numerous awards for his skills. Lastly, John Scarne is an American magician and card expert who wrote several books on the subject. All three of these experts have made significant contributions to the world of cards.