Dear Kate,
How are you been doing recently? I am writing this letter to ask you to borrow a book from you.
The book I want to borrow is The composition of American Higher education Investment. It has a green face. Professor Li has mentioned it at his last class. It is necessary for my new paper. You may also need it , so I will return it before next week.
I would like to express my gratitude to you for your kind help.Please reply me whether I can borrow it at your earlist convenience.
Your sincerely,
Li Ming