Haunted by Thrillers. What are some books that have stayed with you?

Here’s a sample list of books with subtle disturbing elements that I still think about from time to time, even years after reading them.

Broken Harbor - Tana French; Behind Her Eyes - Sarah Pinborough; His & Hers - Alice Feeney; The Whisper Man - Alex North; Behind Closed Doors - BA Paris; The Kind Worth Killing - Peter Swanson; In the Woods - Tana French; The Perfect Nanny - Leila Sulami; Then She Was Gone - Lisa Jewell; The Family Upstairs - Lisa Jewell; The Child Finder - Rene Denfeld