Megan E Abbott

"Kit Owens harbored only modest ambitions for herself when the mysterious Diane Fleming appeared in her high school chemistry class. But Diane's academic brilliance lit a fire in Kit, and the two developed an unlikely friendship. Until Diane shared a secret that changed everything between them. More than a decade later, Kit thinks she's put Diane behind her forever, and she's begun to fulfill the scientific dreams Diane awakened in her. But the past...