Please suggest a book for gaining confidence in my physical self and/or overall confidence in myself

Hi I am suffering from very low self esteem. I feel that im not attractive at all and im in constant insecurity that my partner will leave me for someone else. At the same time i feel that my personality is underwhelming and i dont have a lasting impact on peoples and my friends lives… I want to be better and im already in therapy. Please suggest some books for the same.

by Smooth-Mind4247