make the sentence natural

[ziawj2]

I lost a book that is borrowed from my friend and I wrote a letter to apologize for it. Could you help me make the sentence natural? Thank you!
I am so sorry that I could not apologize to you in person. About the book that I borrowed from you two months ago, I lost it when I moved to another apartment a week ago because of my carelessness.

 

[Tdol]

Wouldn't it be simpler to say something like I'm afraid I lost the book that I borrowed from you when I moved...​?

 

[Barb_D]

And "But I will be happy to replace it, or to get you another book you want from the bookstore"?