Carolyn Hart is an American mystery and suspense writer born in Oklahoma in 1936. She has authored 63 books across multiple series that have established her as a significant figure in the mystery genre. Hart is best known for three main series: Death on Demand, Henrie O, and Bailey Ruth. These series showcase her skill in crafting mystery narratives with recurring characters that have engaged readers over many years. In recognition of her contributions to mystery writing, Hart was named a Grand Master by the Mystery Writers of America in 2014, one of the highest honors in the field.