Nicholas Sparks has had 11 - soon to be 12 - of his bestselling books adapted into feature films, but there was one movie in particular that he was most involved in. "Certainly The Last Song," Sparks, 59, told Us Weekly exclusively while promoting his new novel, Remain, out October 14. "I was a producer. I wrote the screenplay. I wrote the script. I wrote the novel... I was very involved in that all along, and certainly casting, pretty much all those decisions. What producers do for any film project.