Instruct: Classify a given Amazon review as either positive or negative.
Query: A Checklist of Robert A. Heinlein

This is neither a book, nor an essay nor annotated bibliography. It seems to be a complete listing of Heinlien's works in 47 pages. It is divided into Books with 54 entries and short stories with 121 more. It has a title index. Contains great detail on various editions and features. It seems accurate and complete. I have not checked. It would have been wonderful to have had a listing of the works using Heinlein's Future History chronology. At least a few introductory sentences could have been written. It is an immensely useful tool for the serious collector.