Courtesy of Zonderkidz; Courtesy of Subject In 'Leo, Inventor Extraordinaire', out Tuesday, the author tells a middle school adventure mystery loosely based on the life of Leonardo Da Vinci. Luke Cunningham has always had a passion for history. In fact, even before working as a late-night writer on The Tonight Show Starring Jimmy Fallon, he earned a history degree from Brown University, where he developed a passion for the Renaissance. After working on the late-night show for three years — Cunningham earned an Emmy nomination for writing on the late-night series — Cunningham hoped to explore his passion for history when writing his first novel and inspire young readers.