Diane Johnson updates the transatlantic novel so gorgeously rendered by Henry James, Edith Wharton, William Dean Howells, and Nathaniel Hawthorne; evokes the spirit of such expatriates sojourning in Paris as Ernest Hemingway and F. Scott Fitzgerald; and mines the pathos of modern fiction in creating this wonderful and important novel. Isabel Walker, eerily reminiscent of Jamess Isabel Archer, is a young film-school dropout who travels to Paris to aid her stepsister, who is going through a divorce. Isabels California cool, American freedoms, and feminist slants comingle, successfully and fractiously, with the customs, biases, and complex sexuality of modern Europe. The result modulates between introspection and hilarity, and a quick, Hollywood-inspired sweep of violent action in the end doesnt undermine the authors mastery of Old World vs. New--in fact, it provides an ironic scrim.