Murder Thy Neighbour: (Murder Is Forever: Volume 4) by James Patterson
As seen on Discovery ID, these two true-crime thrillers follow a neighbours' quarrel that turns violent and cyber-bullying that explodes in a double murder.
MURDER THY NEIGHBOUR
(with Andrew Bourelle)
Ann Hoover is a nice woman, but she's come to hate her neighbour. Roy Kirk moved in next door with plans to renovate. But as the weeks go by, his DIY construction turns to shambles and Roy himself becomes sullen and hostile. When Ann takes him to court, Roy's retaliation will be shockingly gruesome.
(with Max DiLallo)
Jenelle Potter has always been better at connecting through social media than in person. With overprotective parents, she hasn't had many options to meet people until she links up Billy. But her feelings for Billy are unreciprocated, causing Jenelle to start a virtual war - a war that enters the real world.