The book is divided into five sections with different categories of sound effects (animal, human, mechanical, nature, and other) which makes it handy to search for a specific sound effect (if for some reason you need to know it). I also thought that the layout of the book made it easy to make your own flashcards of sounds that you want to learn or work on (which I did).
As a reference for fun sound effects or a motivator to practice, practice, practice your Nihongo, this book is great! A great gift idea for anyone interested in Japanese language or manga/anime (and yes, that is a hint to my family and friends ^_^).