Keep This to Yourself

 Ryan, Tom. Keep This to Yourself. 2019. 320p. ISBN 9780807541517.

Mac grew up on a spit of land outside of Camera Cove, Maine. There were only four other houses and a farm on his stretch of road, and within a few years of his birth each house had a child living in it of the same age. Soon the five kids were inseparable, more because of necessity than through real connections, but they grew up together. Mac, Connor, Benjamin, Doris, and Carrie met at the end of middle school by the ocean, and they each dropped off an envelope in a time capsule, to be opened on graduation four years later.

Following high school graduation, Mac, Ben and Doris meet under darker circumstances than four years earlier. Carrie has long since stopped hanging out with the group. Connor, for his part, was one of the four victims of the Catalog Killer, a serial killer who last year terrorized the community of Camera Cove and killed the "perfect" family, a father, a mother, a daughter, and a son. 

Despite the time that has passed and the fact that police determined the killer was a transient who had  since moved on, Mac is convinced that the killer is actually much closer to home. Still in love with Connor, but not wanting to admit even to himself, Mac begins asking probing questions to family members of those who were killed, and details that the police ignored or downplayed emerge, pointing to a killer that is closer than Mac realized...