Instruct: Classify a given Amazon review as either positive or negative.
Query: Excellent book (not for children)

Great book, but a warning is issued in the following excerpt on page 1: "If I tried to tell them this story, the one I am about to set down here, their parents would send me warning looks over the heads of the children. Don't, the looks would say. Stop."Parents, pay attention to the words of advise.