A book that made me laugh oh-so many times, but left me heart broken in the end.

I'm not good in giving a summary, so thank God for Wikipedia:

It is a love story centering on a man with a genetic disorder that causes him to unpredictably time travel, and his wife, an artist who has to cope with his frequent absences and dangerous experiences. The story is a metaphor for the failed relationships of Niffeneger herself, who was frustrated in love when she began the work. The tale's central relationship came to her in a flash one day and subsequently became the novel's title.

If you guys are suckers for romantic novels, this is certainly something you should read.