Originally published online, these short stories fill in some of the blanks between the end of Arkham Asylm and the start of Arkham City. But really, there isn't enough here that isn't stated outright in the game or at least alluded to enough for somebody reasonably Batman savvy to figure it out. The one interesting thing that I picked up is that Thomas Elliot was the one who separated the twin mooks. That was interesting, and it actually explained his presence in the game. But I swear that I've read that story about why Joker and Penguin don't get along before. Not this exact version, of course, but it's been done before. The only real market for this collection is fans of the Arkham games, but they'd be better off just playing the games again. Which is always a wise suggestion, in any circumstance.