Marriages aren’t always how they appear from the outside. Sometimes they’re not even how they appear from the inside. That’s how it is with Nick and Amy. To anyone but their closest friends, they have the perfect marriage, built on a glamorous city life, parties and Amy’s family wealth. Then the money runs out, Nick moves them to a small town to care for a sick relative, and Amy mysteriously disappears. Of course, Nick is the main suspect.

Flynn tells the story in two voices. Nick narrates in the present, starting with Amy’s disappearance, while Amy’s side comes from the pages of her diary, starting at the beginning of their relationship. The question driving the plot is What happened to Amy? But the real mystery is whether you can believe either of them. Nick swears he didn’t hurt his wife, and Amy’s diary describes a happy history, but you never quite trust either one. The two stories finally overlap in a mind-blowing conclusion.

The real mystery is that you never know who’s telling the truth.

That setup is why the audiobook works so well. Two narrators are a necessity: a man to play Nick and a woman to play Amy. Kirby Heyborne voices Nick, and his natural, conversational style gives him an innocence that makes you doubt he could ever hurt his wife. Julia Whelan, a prolific narrator, gives Amy a smartness that would seem suspicious if she didn’t sound so darn innocent herself.

Both narrators pull you into their character’s side and carry the mystery all the way through to the reveal. I hate to use a cliché, but this audiobook will literally leave you perched on the edge of your seat, so maybe don’t listen to it while driving, as I did! I spent most of the story wondering who was telling the truth and wanting to believe that both characters were, even though their stories often contradicted each other. It’s a story that will make you nicer to your own partner if you have one, and wary of pairing up if you don’t.