This book is very enjoyable with two to four year olds of our family;however, I was disappointed that Tonka was listed on every truck...and not real monster trucks that compete were highlighted....My fault I guess since I didn't realize it was a generic type book.
The two year old in our family really enjoyed it, but our young four year old who is reading some now was disappointed not to enjoy a story with real trucks like Gravedigger/Eradicator/etc.
I am searching now for a "real monster jam book" and I think he will enjoy it more.
I would buy the book again though with more emphasis on the younger child.