Aside from Jane Austen's Pride & Prejudice, I have had several unresolved relationships with books. The ones that for some reason or another, I could never finish but that I just can't forget about and might need to finally finish someday.
Among them are:
The Unbearable Lightness of Being, Milan Kundera
Gulliver's Travels, Jonathan Swift
Watership Down, Richard Adams
The Joy Luck Club, Amy Tan
I had to give away Pride & Prejudice and The Unbearable Lightness of Being because I couldn't stand seeing them in my bookshelves; a constant reminder. Somehow the other ones didn't anger me so much. Probably because I didn't invest as much time in them. I gave up as soon as I realized I wasn't enjoying myself and stopped pretending that if I just kept reading maybe I would.