Sammy Keyes and the Cold Hard Cash: Library Edition

In her latest mystery, Sammy Keyes feels responsible for the death of an old man who she discovers on the fire escape and who, with his dying breath, begs her to take his wads of cash and throw them away! While she debates what to do about the money, which she could definitely find good use for, she attempts to uncover the motives of the strange man asking questions about the old guy. The cold hard cash she's found seems to be burning more than a hole in Sammy's pocket!