"You never know who is watching" -- Cover.

"Instagram-famous triplets Cecily, Amber and Rudy Cole--the children of home renovation superstars--are ready for a perfect summer. They're on track to reach one million followers with a few carefully crafted posts, and they've just moved into the site of their parents' latest renovation project: a three-million-dollar McMansion in upstate New York. Just hours into the move, the Cole triplets begin to receive spine-chilling messages from a follower staking their claim over the house. It soon becomes clear that this anonymous threat is more than a simple Internet troll, and the follower can't wait to shatter the Cole family's perfect veneer and take back what's theirs. As the eerie warning manifest into deadly 'accidents,' the Coles begin to look into the history of the house--and the chilling secrets they uncover are far more than they bargained for"--Jacket flap.

13+ years old.