Penny Nichols and the Mystery of the Lost Key

An inquisitive young sleuth and her friend investigate a missing key linked to jewelry, a wall safe, and mysterious visitors at a hotel and a mountain resort. The pair follow clues—scraps of paper, late-night noises, a face at a window, secret stairs and an ivory collection—uncovering theft, deceptive guests, and a daring boat escape before exposing the culprit and recovering evidence. Chapters combine straightforward clue-gathering, stakeouts, and adventurous nighttime episodes that emphasize observation, resourcefulness, and the unraveling of a small domestic mystery.