Psychology of Emotions, Carroll Izard or Carlson Physiology of bechavior.
There you will find a lot of scientific information in a popular or accessible form.
There is also a little about emotions in D. Myers' textbook Psychology
“Wait, who is leading? Biology of human behavior and other animals "Good, a book by biologist Dmitry Zhukov.
You can start with Paul Ekman - Emotions Revealed. Or from an older book, sometimes referred to in the book above by Darwin - Expressing Emotions in Man and Animals. In general, the first book contains many guidelines for deepening knowledge.