"Anyone is capable of murder, given the right motivation." When a girl is found dead of hypothermia in the middle of an Atlanta heat wave, the police are baffled. But Tara Sharp thinks it may be just the clue she needs to find her missing little sister. As she unravels the complex case, she becomes one of nine suspects, each a different number on the Enneagram, in the murder of Michael Higgins. Each suspect will be true to their Enneagram number as they navigate stressful situations, like meeting a boyfriend's parents for the first time, or planning a murder. Read along to unlock clues to which character is which number on the Enneagram-and, of course, which is the killer!

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