What are the differences between the book and the movie?

I read it; it wasn't much like the movie. The book was written in the late 60's and set a couple decades after a nuclear holocaust and Hell Tanner (his first name was Hell) was a biker gang leader, his character was similar to Snake Plissken, I guess, in his personality and badass attitude. There are other similarities to Escape from New York, as Tanner was jailed, but given a pardon if he could successfully drive from California to Boston with some sort of plague serum for the people in Boston. What was left of the US between California and the east coast was a wasteland and there were giant mutated creatures and the few humans who lived there were barbarians, like in the movie. There were also storms of Biblical proportions, like in the movie, and because of the storms, air travel was not possible. Denton I believe was the guy who accompanied him on the trip, but as I remember it he was killed early on in the trip. Tanner had a special car that had been tricked out with a bunch of gadgetry like guns and things.

7 ounces of cheap paper.

"You may have come on no bicycle, but that does not say that you know everything."

Just read the book a few weeks ago. The biggest difference is that the main character is a driver on a medical run to deliver serum, as opposed to the last remnants of an Air Force base leaving because they have nothing at home. Besides that, he runs into more people, but the basic story is the same. Nasty war, all kinds of weird anomalies and dangers, and a bad-ass car.