The Whisper at Signal Ridge (Trail Quest Mysteries, #3)

The ridge answers twice. One recording is a lie. When a strange note leads Emily and Quinn to Signal Ridge, the citizen-science listening project is already producing impossible echoes. Copied recordings, missing return sheets, and a timeline that refuses to line up turn a harmless field test into a deliberate manipulation. To expose who is controlling the story, the girls must build a clean test and trust what the evidence actually says.