I love an addictive YA thriller and this looks like one that will be a top pick for 2021! I'm intrigued that the story focuses on the mother's disappearance. Most YA novels focus solely on the teens and I think this will interest both adult and teen readers. Our Last Echoes would make a terrific book club selection for teens or adults. Can't wait to read the rest of the book and recommend it to library patrons!