The Silver Linings Playbook
I went to see the film adaptation of this novel last month, absolutely loved it and then the friend I went with went on to buy me the book.
The book and the film are very similar, protagonist Pat has been in a psychiatric facility for some time when his mother calls time on it and checks him out. Post-breakdown Pat has a new philosophy : he is determined to look for silver linings and happy endings and he's going to turn himself into the perfect husband to his wife Nikki. The thing is, Nikki is nowhere to be seen, there's more than one restraining order in place, and what exactly happened to send Pat to "the bad place" is never spoken of. Living not quite in-step with reality, Pat strikes up a friendship with the equally damaged Tiffany.
The film of this book made me howl with laughter and was really popular with the audience I was in, and the film has been true to the book in the sense that it recreates some of the books best moments like "the Hemingway scene". This is however among some of the rare cases where film beats book, the book gets dragged down by the sporting side of the narrative, players and scores etc, in a way that the film doesn't, and is so well acted that it is easier to take the characters into your heart.
The differences towards the end give the book the edge in terms of realism, and particularly Pat's struggle with the concept of time is left out of the film presumably because it would be hard to express visually, but adds weight to the extent of his delusion in the book yet ultimately for me the heartwarming humorous film is a 10/10 but the book is only a 7.