Bill Finger was a contributing force on Batman right from the beginning. He wrote most of the great stories and was influential in setting the style and genre other writers would emulate … I made Batman a superhero-vigilante when I first created him. Bill turned him into a scientific detective.
Bob Kane and Tom Andrae (1989). Batman & Me. Forestville, CA: Eclipse Books. pp. 43. 1-56060-017-9.