Write a letter to your friend asking book you lent sometime ago.
13 February 2020
My dear ‘X’
I hope you are keeping well by the grace of Allah. Our BSS examination is knocking at the door. So I am very busy with my studies. You borrowed my English guide about a month ago. You assured me that you would return the book within a few days. Perhaps you have forgotten to return it. Now I need the book very badly for my preparation. So I request you to return the book as soon as possible. If you need it again, I will need it for you after my examination. Please don’t take it to mind.