The Vanishing Stair Novel by Maureen Johnson

The Vanishing Stair by Maureen Johnson is the second book in the Truly Devious series. It follows Stevie Bell, a teenage detective, as she continues to investigate the decades-old unsolved mystery of the kidnapping and murder of a wealthy family in the 1930s. After being invited back to the prestigious Ellingham Academy, Stevie uncovers new clues and faces dangerous secrets that could put her life in jeopardy. As she digs deeper, Stevie must navigate complex relationships and dark conspiracies while seeking the truth.