You borrowed some books from your school or college library. Unfortunately, you have to go away to visit a sick relative and cannot return the books in time.

I hope this letter finds you well.

I am writing to inform you that I borrowed some books from the library which I am unable to return on time. Unfortunately, I have received news that a close relative of mine is sick and I need to travel to be with them during this difficult time. Due to this unforeseen circumstance, I will not be able to return the books by the due date.

Currently, my relative's health condition requires my immediate attention and support. It is a challenging time for my family, and I must prioritize being there for them. As a result, I am unable to come back to the library to return the borrowed books within the specified timeframe.

I kindly request your understanding and cooperation in this matter. I would like to inquire if there is a possibility to extend the due date for returning the books until I am able to come back from my trip. I assure you that I will return the books as soon as I am back in town and settle any late fees that may be incurred.

I appreciate your consideration and assistance during this difficult time. Thank you for your understanding.