Old Metairie Mystery Book Club - Middle of the Night by Riley Sager

The worst thing to ever happen on Hemlock Circle occurred in Ethan Marsh’s backyard. One July night, ten-year-old Ethan and his best friend and neighbor, Billy, fell asleep in a tent set up on a manicured lawn in a quiet, quaint New Jersey cul-de-sac. In the morning, Ethan woke up alone. During the night, someone had sliced the tent open with a knife and taken Billy. He was never seen again.