Bill FingerBill Finger.

Milton "Bill" Finger (February 8, 1914, c. January 18, 1974) was an American comic book writer who is credited with co-creating the DC Comics character Batman with Bob Kane. Despite making major (sometimes, signature) contributions as an innovative writer, visionary mythos/world builder and illustration architect, Finger (like other creators of his era) was often given "ghostwriter" status on comics he created or co-created, including those featuring Batman and the original Green Lantern. In recent years, Finger has received recognition for his contributions.