Polar Express, written and illustrated by Chris Van Allsburg. I love the illustrations. Made into a movie, and the inspiration for many, many Christmas train-ride excursions.
Here's the blurb:Van Allsburg also wrote Jumanji. You can get the book on Kindle for just a skosh under $10 or the hardcover (go for the hardcover) for a little less than $12. You can buy it here.