Answer:
Dear___________________
I am writing you this letter as notification that I would like to remind you regarding the books you have borrowed in our school library on ___________[date].I am humbly requesting you to return those books any moment from the day you received this letter.This because we`ll be needing them for this coming school year. I hope to hear response from you about this through the said contact details above.
Thank you very much.
Respectfully yours,
[signature]
[typed name].