made by Marc Tyler Nobleman author of the book of the same name:

Every Batman story is marked with the words, "Batman created by Bob Kane." But that isn’t the whole truth. A struggling writer named Bill Finger was involved from the beginning. Bill helped invent Batman, from concept to costume to character. He dreamed up Batman’s haunting origins and his colorful nemeses. Despite his brilliance, Bill worked in obscurity.

Based on original research, Bill the Boy Wonder is the first-ever book about the unsung man behind the Dark Knight.

http://www.charlesbridge.com/client/client_pages/BilltheBoyWonder/bill_home.html