Or else : a thriller
(Book)

"A secret love becomes a fatal affair in a twisting novel of suspense by Wall Street Journal bestselling author Joe Hart. When novelist Andy Drake returns to his hometown to care for his ailing father, a reconnection with his childhood friend Rachel escalates into a secret love affair. For Rachel, struggling to maintain the facade of a picture-perfect life, it's an escape from an emotionally abusive marriage. Then Andy receives an anonymous note warning him to end the affair. Or else. Whoever's been watching is going to make Andy pay. Weeks later, Rachel's husband, David, is shot to death. Rachel and her two young sons vanish without a trace. One misstep, one careless reveal, and Andy could look as guilty as sin. Clue by clue, as his investigation into the mystery unfolds, Andy discovers that he and Rachel weren't the only ones keeping secrets. Nothing in this quiet neighborhood is as it seems. No one peeking from behind the curtains of their homes can be trusted. And the worst is yet to come. Because David isn't the only one who will die."--,Amazon.com