What follows is a cat-and-mouse game of text messages, hidden emails, and office secrets. McFadden masterfully explores themes of jealousy, perception, and how well we truly know the people sitting three feet away from us.

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Forget haunted houses. The scariest setting is an open-plan office with bad fluorescent lighting. McFadden masterfully uses the mundane (spreadsheets, coffee breaks, Slack messages) as weapons of psychological warfare.