Subway: The Story of Tunnels, Tubes, and Tracks

Not easy and clearly for PreK groups

Juvenile Book About Subways - Pretty good book for a third-grader...learn the basics. Frankly I expected a more adult popular history of the subways. Maybe I didn't read the fine print too well...but it's a good book for the novice.Price was a little steep for what I got!http://www.amazon.com/gp/product/1590781767/ref=cm_cr_rev_prod_title

A good read for anyone desiring to know about the subway tunnels. Recommended.