Alex Mar joins Maris Kreizman to discuss her new book, Seventy Times Seven: A True Story of Murder and Mercy, out now from Penguin Press.

Alex Mar is the author of Witches of America, which was a New York Times Notable Book and Editors' Pick. She has been a finalist for the National Magazine Award in Feature Writing, and she is the director of the feature-length documentary American Mystic. She lives in the Hudson Valley and New York City. Her latest book is called Seventy Times Seven.

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