The Vanishing Stair (original) Maureen Johnson

All Stevie Bell wanted was to find the key to the Ellingham mystery, but instead she found her classmate dead. And while she solved that murder, the crimes of the past are still waiting in the dark. Just as Stevie feels she’s on the cusp of putting it together, her parents pull her out of Ellingham academy.

For her own safety they say. She must move past this obsession with crime. Now that Stevie’s away from the school of topiaries and secret tunnels, and her strange and endearing friends, she begins to feel disconnected from the rest of the world. At least she won’t have to see David anymore. David, who she kissed. David, who lied to her about his identity—son of despised politician Edward King. Then King himself arrives at her house to offer a deal: He will bring Stevie back to Ellingham immediately. In return, she must play nice with David. King is in the midst of a campaign and can’t afford his son stirring up trouble. If Stevie’s at school, David will stay put.