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Carolyn Hart
Carolyn Hart is an American mystery and suspense writer. She is the author of 63 books, including the Death on Demand, Henrie O and Bailey Ruth series. In 2014, she was named a Grand Master by the Mystery Writers of America. She was born in Oklahoma in 1936.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Dead Man's Island
2009
ISBN 9780307569370