Do u know some good books about improving self-esteem?

I'd suggest reading history, philosophy, poetry, everything you can, and pursuing any hobbies or activities that interest you... Basically as much as you can do that has nothing to do with the self-help section of the bookstore, because that will immerse you in new things & new ways of thinking & that way you'll become a well-rounded individual rather than just blanketed in an air of false satisfaction.

You know what's best for you. Everything you want is within you.