Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Absolute Best book on birds.

I've had this book for years, but recently purchased a copy for my mom on Mother's Day. She loves it as much as I do and we both prefer it over the other bird field guides we have. For non-experts on bird identification, this book is a must. I have identified a number of birds in my back yard and around the area with this book. The illustrations are excellent. I agree with one of the reviews I saw that said it is not the right size for carrying out into the field in a backpack. It is a hefty and detailed reference book for the home.