The book is about the Golden Age of comic books and of two young men who seek their fame and fortune. They do it by basically making their own Superman and getting exploited for it and stuff. If you want to know what happens next, read the book. The book is set mostly in beautiful 1930s and 1940s New York City and there are a lot of landmarks you will recognize if you know the city. Also there's the Empire State Building.
There are some really clever parts in the book, and some parts you knew were going to happen all along after reading one character description or something, and other parts that you didn't see coming. You know who's gonna fall in love with whom, at least. Michael Chabon does not appear to be known for his subtle foreshadowing.
All in all the book really touches on a lot of things about wartime New York and the world around it and comic books. Lots of comic books and characters who show up and actual writers and artists and publishers who are featured (some with speaking parts) and then in the 1950s the whole bit where the psychologist got the Senate to crack down on violent and sexy comic books and put a lot of good people out of work because of it. All that is there and it is a book I could not stop reading until I had finished it, and now I have to go back and re-read it again because when you get all "oh oh oh I cannot stop reading until I finish it" you may tend to rush in parts. So I gotta read the parts I rushed over. But I do not mind because this book is a very good book.
I will say that I liked it. Okay that is my report