Even more prolific than BarkerC by SheahanJ

Question 12

He was already a prolific author in his own right, penning works under the pseudonyms of Arthur Winfield, Victor Appleton, and Laura Lee Hope, when he discovered that he could increase his production exponentially by hiring ghostwriters to write his books for him. Name this creator of an eponymous syndicate, which would later also include books written under the names of Franklin W. Dixon and Carolyn Keene.