Clue of the Silken Ladder

On an impulse, Penny buys back her old car, the Leaping Lena, even though she has a new car and no money, but fortunately, she gets another job at her father's newspaper. Penny discovers a strange silken ladder and learns how it is used in burglaries. She also connects the burglaries with a group of fake mediums, and her story earns her a much-needed raise in pay at the newspaper.