If you haven't read this book, you should. I believe it's from James Patterson. I keep seeing this movie called "Remember Me," and I was wondering if it is similar to this book.
They are however making a movie based on a novel that is very similar to Sundy's At Tiffany's, it's called 'If You Could See Me Now' by Cecelia Ahern ( which is about a woman who falls in love with her nephews' imaginary friend) since you liked Sunday's At Tiffany's you'll probably like this novel as well.
