Whose first novel was titled "This Side of Paradise"?

Francis Scott Key Fitzgerald (September 24, 1896 – December 21, 1940), known professionally as F. Scott Fitzgerald, was an American novelist and short story writer, whose works illustrate the Jazz Age. While he achieved limited success in his lifetime, he is now widely regarded as one of the greatest American writers of the 20th century. Fitzgerald is considered a member of the "Lost Generation" of the 1920's. He finished four novels: "This Side of Paradise", "The Beautiful and Damned", "The Great Gatsby", and "Tender Is the Night". A fifth, unfinished novel, "The Last Tycoon", was published posthumously. Fitzgerald also authored 4 collections of short stories, as well as 164 short stories in magazines during his lifetime.

It was while attending Princeton that Fitzgerald met Chicago socialite and debutante Ginevra King on a visit back home in St. Paul. Immediately infatuated with her, Fitzgerald "remained devoted to Ginevra as long as she would allow him to," and wrote to her "daily the incoherent, expressive letters all young lovers write." She would become his inspiration for the character of Isabelle Borgé, Amory Blaine's first love in "This Side of Paradise", for Daisy in "The Great Gatsby", and several other characters in his novels and short stories.