Out of Malibu, Calif., came one of the most influential literary works of modern times. And this spring,48 years after it was published, the whole town is reading it. I refer to the novella "Gidget," which Malibu recently picked for its "One City One Book" program. Laugh if you must, then ask yourself the following questions: Did "The Great Gatsby" change the world? How many people decided to move or quit their jobs after reading "Moby-Dick"? "Gidget," on the other hand, altered the course of American history, drawing legions to California beaches, spawning a lineage of movie and TV spinoffs...