Cindy Callaghan is best known for her book Just Add Magic and its sequel, Potion Problems, which are the basis for the Emmy-nominated Amazon Original live-action series Just Add Magic. She is also the author of the middle-grade novels Lost in London, Lost in Paris, Lost in Rome, Lost in Ireland (formerly titled Lucky Me), and Lost in Hollywood; the award-winning Sydney Mackenzie Knocks 'Em Dead; Saltwater Secrets, which is also set up at a major studio; and, most recently, The Girl Who Ruined Christmas. Cindy lives in Wilmington, Delaware.