Egg Marks the Spot — Amy Timberlake

Newbery Honor author Amy Timberlake returns with a follow-up to the bestselling, award-winning Skunk and Badger. With illustrations by Caldecott medalist Jon Klassen, this new adventure begins as Skunk and Badger head out on a rock-finding expedition, finding surprises behind every boulder.  

Buried in the heart of every animal is a secret treasure. For rock scientist Badger, it's the Spider Eye Agate he found as a cub, stolen years ago by his crafty cousin, Fisher. For Badger's roommate, Skunk, the treasure is Sundays with the New Yak Times Book Review. When an old acquaintance, Mr. G. Hedgehog, announces his plan to come for the Book Review as soon as it thumps on the doorstep, Skunk decides an adventure will solve Badger's problems as well as his own. Surprisingly, Badger agrees. Together
they set off on an agate-finding expedition at Badger's favorite spot on Endless Lake.

But all is not as it seems at Campsite #5. Fisher appears unexpectedly. Then a chicken arrives who seems intent on staying. Something is up!

Indeed!

Secrets, betrayals, lies

. . . and a luminous, late-Jurassic prize.