From: MarvelousGerbil | #005
Are any of these in trade paperbacks? I know I've seen Joker's Asylum before, but what about the others?
Not sure. I would assume Year One is, but it might be hard to find. Knightfall and No Man's Land have TPBs but not of the Scarecrow sections alone. You'd have to buy the whole story (which you should anyway because both are overall great stories and it'd make the Scarecrow sections better if you were more familiar with the setting).
As for Absolute Terror, it's only two issues so if there is a TPB it'd be collected with something else. I don't know though, never seen anything. Might have to get those issues separate if you can.
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~Halo Now darkness takes you... forever.