All in all there will be nine anniversary Trades:
Batman: Prelude to Knightfall
Batman: Knightfall Vol. 1
Batman: Knightfall Vol. 2
Batman: Knightquest: The Crusade Vol. 1
Batman: Knightquest: The Crusade Vol. 2
Batman: Knightquest: The Search
Batman: Knightsend
Batman: Prodigal
Batman: Troika