When I Killed You by Liam Fialkov

Thirty years ago, nine-year-old Alice vanished without leaving a trace.
Alice’s mother suspects a self-fulfilling prophecy is at play.
The father, a physics professor, seeks answers in intricate physics.
The older sister, an author, writes stories that shed light on the family’s interactions.
Two investigative journalists try to figure out the mystery and understand why the police and FBI had failed.
What happened to Alice?
With every page, the tension builds until the stunning conclusion. But there is more… as the narrative embarks upon alternative endings in parallel universes…