Instruct: Classify the given review into positive or negative sentiment.
Query: Farmall cub research

I bought this book because my late grandfather owned a farmall cub that has several implements, although it belongs to my uncle now I wanted to research it for its originality and the year it was made, a very informitive book.I found the book to be very accurate in where to find the information I needed on the tractor itself as well as learning about the other tractors Farmall made.