This is one of those books I read because I remember thinking the movie was great when I was young. By today's standards the movie sucks.
The book on the other hand does not suck at all. I think it was fun and exciting. OK, maybe there were events that were a little too convenient. Maybe the story line could get a bit choppy. Things like Logan gets knocked out...when he wakes everything is OK and it is time to move to the next scene. I can overlook those things because I really liked the story. I really liked that this novel was VERY different than the movie.
I wish the movie had some of the elements of this book. The prison called "Hell". The Crazy Horse Mountain. The Thinker. The Sky Gypsys. The Baby Home. The Civil War reenactment. The whole idea the Sanctuary is not just some place with an old guy hanging out. I liked the whole twist with Francis (the other Sandman). I loved the way Logan and Jessica become a pair much better in this book than the random hookup in the movie. I liked the whole story with the cub scouts much better. Box was much more than some robot living in an ice cave. The maze.
This book has so much more to offer than the movie ever did. It makes me regret that I did not read it 20 or 30 years ago.
I have purposely avoided specifics regarding the plot line. I think that you should give it a shot, especially if you liked the movie at all.
Is it great writing? No, not really. I do recommend it because it surprised me with the joy it gave me while reading it.