Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Puzzles for savvy sleuths

Picking up from where he strayed, Lawrence Treat uses clever drawings and witty prose to befuddle the amateur sleuth in this third in his series. His is an excellent series of books that can be adapted for detectives of many ages-- I know because I use them with my students.Some of the puzzles require good observation, others require sharp wits, and all put a lethally grand combination of pictures and storylines that are fun to read and solve. The questions at the end of each story point sleuths in the right direction.