The first two chapters are literally just a kid cleaning his room and walking across the street. -Friend. Anyways,
the main character and his friends search for fossils in a wooded area. They
walk into a tunnel but it turns out to be a dead end. Then zombies come up from the ground and attack them. At the end of the book, the zombies go back underground. The kids nearly escape with their lives.
The Underground Undead of Utah