I like Colbert but this isn't his best work. Reads like an intern wrote it. Funny in parts but too much of the same tone throughout. He's much better in person!
The audiobook in particular is pretty good. Colbert's character can drag on when it's not in 30 minute segments, but listening in a few sittings solves that.
Colbert maintains his skeweringly funny satire. The audio book is the better decision, as Colbert's delivery outshines the extra jokes in the book's margins.
I bought the audio book and liked it! I haven't read the print version, but I imagine it's not quite the same experience as listening to Colbert preach it.