I bought this book based on a strong review, and was quite disappointed. Any reviewer who praises this book's imagination clearly hasn't read a comic book within the last 5-10 years. The settings, characters, and powers all seem to have been lifted wholesale out of the most dire quick cash-in books of the 90s comics boom.
I will grant that there is some amusement to be found in Dr. Impossible's story. His wry, matter-of fact viewpoint is often entertaining, and the telling of a comic book tale from the villain's side is at least a bit unusual, if not unheard of (see Astro City: The Tarnished Angel, for one particularly fine example). Unfortunately, Dr. Impossible's side of things only occupies half the book. The rest of it is told from Fatale's perspective, and she's an absolute bore. A cyborg with a lost past, she doesn't seem to be terribly passionate about anything. The most she ever manages is some uninspired teenage-esque angst that her character seems much too old for.
In fact, the Dr. Impossible/Fatale contrast is indicative of a larger problem with the book. Grossman has some fun poking into the psychologies and histories of his villains, people with frightening powers living with the perpetual cognitive dissonance that exists between their world-conquering ambitions and inevitable humiliating defeats. He has no such insight, however, into the minds of his heroes. None of them spend any time pondering why they chose to put on tights and fight crime. Dr. Impossible wonders why he didn't choose to become a hero instead, but none of the heroes ever ponder why they didn't choose to just go rob a bank and retire to a tropical island. None of them appear to get any particular enjoyment from fighting crime, or derive any pleasure from helping others, so why do they do it? This book has no answers, so it does its best to dodge the question. Worse, Grossman attempts to substitute angst and bickering amongst his heroes in place of psychological depth. The New Champions, the super team that Fatale joins, bicker and sulk like a car full of high school students reluctantly dragged on a field trip, rarely displaying a single likable trait between the seven of them.
Worse still, this book reads more like a first draft than a published work. The writing is sloppy and inconsistent, and the whole thing seems to have been untouched by an editor. Descriptions are few and far between; it reads more like a comic book script than a novel, still waiting for an imaginative artist to draw in the undefined settings, faces, and costumes. Characters repeat observations several time throughout the book, each time as if they're new. The book is riddled with inconsistencies and dangling plot threads. Dr. Impossible sometimes talks as if he loathes magic and does his best to avoid it, and sometimes comfortably mentions incorporating it into past and future plans. Fatale observes that a hammer weighs a couple hundred pounds, then, several paragraphs later, picks it up and finds it "surprisingly heavy." Conflicts are set up, but never pay off. Other conflicts seem to appear out of nowhere. A scene in which Fatale accuses a mystical teammate of not being a real fairy comes entirely out of left field; one scene later, the conflict is completely forgotten, and is never mentioned again.
Character voices are also wildly inconsistent. Everyone sounds the same in conversation, and no one sounds particularly interesting. Dr. Impossible, an evil genius, comes the closest to having a unique voice, but even he bounces unpredictably between occasionally inspired bits and inexplicably juvenile lines such as, "Whatever. Just don't think you can stop me." Most dismayingly, the two narrators sound remarkably similar for most of the book, with the only distinct difference being that Fatale's utterly flat sections lack the occasional moments of inspiration that sparingly pepper Dr. Impossible's narrative.
This book is an "adult" take on superheroes only when compared to the simplistic comics of the 30s-50s. The story and dialog ibook don't hold a candle to the clever and insightful works of such modern-day comics writers as Kurt Busiek, Brian Michael Bendis, and Neil Gaiman. The novel format tries to sell this as a more adult and literary take on comic books, but it's ultimately just a pale and surprisingly shallow imitation of the real thing.