Night Games (Fear Street Series #40) by R. L. Stine

It's all fun and games until a prank goes fatally wrong in this spine-tingling young adult thriller from Goosebumps author R.l. Stine. Diane and her friends have been sneaking out every night to play pranks while Fear Street sleeps. She loves breaking the rules, just a little, and pushing the limits of what they can get away with. Not to mention that whatever they get up to in the night is all the town can talk about the next day. No one likes the rush of a good practical joke more than Diane's boyfriend, Lenny, who has masterminded some of their best work. But when he sets his sights on one of the most hated teachers at their school, the group finally goes too far...and the consequences are deadly. And on Fear Street, even death can't stop people from getting their revenge.