One Day by David Nicholls
Wow. What a book.
I picked this one up because I liked the idea of checking in with the two main characters, Dexter and Emma, on the same day each year. The book follows the two of them for 20 years. They just live their lives. Sometimes they are in touch, sometimes not, but they have this undeniable connection. To say anymore about it just wouldn't be right.
I will say though, that I cannot remember the last time I had such an emotional reaction to a book. Read it.