Instruct: Classify a given review as either positive or negative.
Query: a very disappointing book

This book..the 37th Hour, had a interesting idea as it's central theme, which was the disappearance of the husband of Detective Sarah Pribek, the main character in the novel. . The author completely floundered with her attempt at developing the "reason" for his being missing and she finally staggered to a totally unbelievable, pitiful ending.