What the Dead Know

What the Dead Know is a crime thriller by Laura Lippman published in 2007. The story, set in Baltimore in 2005, is about an investigation into a woman who claims to be Heather Bethany, a girl who had gone missing thirty years before. The book was critically acclaimed. It won the 2007 Quill Award in the mystery/suspense/thriller category and 2008 Anthony Award for Best Novel.

Reviewers saw What the Dead Know as a success both as a well-crafted mystery and as an emotionally powerful novel.The Guardian called it a "realistic and poignant detailing of emotional hide-and-seek, ... an excellent mystery and a thoughtful exploration of the nature and effects of grief and loss." The reader is kept guessing to the end as to the identity of the mystery woman.