Hush is just into it's penultimate chapter so i don't htink it's out yet in graphic novel format.
if you've been following Jim Lee since he began to expand his creative contributions (Uncanny X-Men), you will have noted that he he likes long sweeping arcs that seems to include everyone and their brother and that take the express elevator down fast with its fast action that there's no time to pause to reload. HUSH is one of the better Batman story arcs in years and the latest issue's revelation will leave every fanboy stupefied.
Haven't been much of a Batman fan in a longtime. Stopped being one after the second Batman movie coz I think they went overboard trying to outdo each other with stories that just weren't there. I'm in this because it's Jim Lee. Tho Jeff Loeb is a good writer, Jim's inprint is all over the book. After HUSH, I'm outta there like a bat out of a cave at night.