This book gives an extremely complete look at emotions from the perspectives it promises. While the section on evolution is somewhat speculative, the section on biology gives a comprehensive look at how emotions are manifested in the brain, with multiple complimentary models presented in the psychology section. The book is extremely well written and easy to read and understand, yielding an excellent primer on understanding emotions in life. I still find myself referring to it quite often in discussions about emotions months after I finished reading it.