Penny Nichols and the Mystery of the Lost Key

Penny Nichols sees something she shouldn't have. Watching a thief swipe a diamond ring from a department store jewelry counter pulls her into Rosanna Winters' problem: a recently inherited estate, a missing key, and multiple people fighting to claim it. With her friend Susan, Penny dives into a world of competing heirs, deception, and danger, all while trying to get Rosanna to a lawyer before it's too late. This mid-century mystery has the warm confidence of classic children's storytelling. Penny is clever without being insufferable, brave without being careless. The mystery has real teeth, people are lying, someone is always one step ahead, and the danger is genuine, but the story never loses its fundamental goodness. For readers who love plucky girl detectives and puzzles that actually require solving, this remains a hidden treasure worth discovering.