This is very fun. It's uneven and often derivative, but that's kind of the point: it's in the "throw a joke a second and some are bound to stick" tradition and in the "broad and easy satire by forcing modern life into stock genre" genre, making it a light read filled with some good comic ideas and some light and easy social satire.
The book is billed as the memoir of Captain Freedom, a has-been superhero telling his rags-to-riches-to-washed-up-but-still-rich life story, taking us through his days as a sidekick ("Liberty Bill") to his early hero days, to being the top hero around, and then down to being a nobody and trying to claw his way up.
The recurring theme is around heroism versus self-interest; Captain Freedom is so convinced people only do heroic things for the fame--and the heroes around his agree--that he isn't even able to be cynical. His sidekick, DJ, has a better grasp of the world but no better view of people and the assembly-line, Hollywood studio system-inspired hero industry does nothing to change their minds.
The plot, weak as it is, falls apart a few times and the flashbacks and memoir structure isn't well handled, but none of that gets in the way in this type of book.
I like these light satires and I wish they were more common these days (they come in and out of fashion like most things). Don't expect too much going in, but enjoy the observations and the jokes.
It helps to know a little something about comics, at least in broad terms, but it isn't any more necessary than knowing about psychology is to watching The President's Analyst.