In fact, in my opinion, as long as books can be published, they are all good books, because they all have at least one attraction to read, whether it is interest or selling point.

But I think it is a good book for individuals to help them grow up now. For example, a chef, perhaps for him, all kinds of new recipes and nutrition combinations are good books, and fluent Arabic may be of little use.

For a student at school, all kinds of books about how to learn and improve may be good books. Of course, children are in the stage of physical and mental development, so it is necessary to read more other books, which can broaden their horizons and polish their character.

Other books are divided into "gender", what fashion magazines and clothes are more suitable for girls, and books with masculinity, such as "Special Forces School", are more suitable for boys.

I hope my answer is helpful to you, and I wish you find that good book in your heart.