I’ve read No Man’s Land as well. I also listened to the excellent radio dramas of Knightfall and Death of Superman (wish they’d do more of those). I’ve listened to some of the novelization of 52, but the stuff they cut out made me kind of lose interest.
In the mid-2000s, DC also commissioned original novels not adapted from specific storylines, which I’ve enjoyed - Green Lantern: Hero’s Quest by Denny O’Neil, Green Lantern: Sleepers, a trilogy driven by Christopher Priest, and a couple others. I also liked some of the YA novels, like Lois Lane, and Catwoman: Soulstealer - which in a funny twist on this thread, are getting comic adaptations. 