Thread:Negradisen/@comment-3361105-20130830214242/@comment-16025362-20130920192557

The 2000 paperbacks use "part" and the 2012 paperback use "volume", so it could be solved like this.

The 2000 paperbacks:
 * Batman: Knightfall Part One - Broken Bat (Collected)
 * Batman: Knightfall Part Two - Who Rules the Night (Collected)
 * Batman: Knightfall Part Three - KnightsEnd (Collected)

The 2012 paperbacks:
 * Batman: Knightfall Volume One (Collected)
 * Batman: Knightfall Volume Two - Knightquest (Collected)
 * Batman: Knightfall Volume Three - KnightsEnd (Collected)