The original graphic novel was first published in 1999. The characters in the novel were not given names, both characters were only referred to as "him" and "her". Chinese title of the book translates to "Turn Left, Turn Right", "A Chance of Sunshine" is the original English title of the book, on the newer published editions the English title is shown as "Turn Left, Turn Right". The book consists of a series of detailed illustrated images, with a small amount of text in poetry style. The film has managed to include every single image in the book with a high level of accuracy, although some are fleeting.