It's an excellent resource, especially useful for students and new writers. The authors list and define emotions and demonstrate a variety of ways to express them in your writing through body language, sensations, mental responses and various cues.
Experienced authors can use the lists as a reference to challenge themselves to go beyond what is listed and to create new and original ways of expressing their fictional characters' emotions.
If you’re the kind of writer that likes to ‘show’ rather than ‘tell’ then this book is for you! Tonnes of physical emotions are described and using it on kindle means related emotions are just a click away. Highly recommend this book for anyone who wants to improve their writing.