This is the second part in a crossover, which originally made me nervous. DC has been pretty bad at making it easy to read the second part of something, even second issues, without having read the first. When I got scolded and told 'how dare the authors and artists want you to read everything,' ...
Just a fantastic collection. The first half is really good, but the back half is just amazing. Harren goes all out for one of the best monster battles in comics, ever. Definitely recommend it even if you aren't caught up to this point, just to see his art.