Instruct: Classify a given Amazon review as either positive or negative.
Query: A complex, well-written mystery

The well written prose drew me into the story. The protagonist, Ellie - a single mom just trying to get by - is easy to like and relate to. When someone finds Ellie's name in the possessions of a dead man, Ellie is unwittingly pulled into a mystery. The clues she uncovers reach all the way back to World War II and Nazi Europe, and touch very close to home. There is enough danger and suspense to keep the pages turning until the satisfying conclusion.