What Lives In The Swamp?

This is the seventh book in Joey's adventures. Joey is looking forward to the Dinosaur Dig starting in the Pond, but first he would like to check out what is at the swamp in Dinosaur Days. So Joey and his dad are off on a tractor/time machine adventure. What will they see this time? What will chase them this time? And then when Joey is at the Dinosaur Dig Site, what will the Dig Team find in the Pond millions of years later? Joey can't wait to see what happens. Can you?