It's an extraordinary day on Piggy Island because the Angry Birds haven't lost their eggs, they've found something amazing: a bone! Not a plain old bone-a huge and very old bone. What kind of giant creature could this bone have come from? That's a question for Mighty Eagle-the wisest bird they know.

Join the Angry Birds on their imaginary trip through time to discover the most awesome animals ever to roam this planet: the dinosaurs! But why do the Angry Birds feel such a special bond with the ancient beasts? Maybe Mighty Eagle knows the answer!

This book is part of a book series called Angry Birds Playground .

There are 128 pages in this book. This book was published 2016 by National Geographic Kids .

JILL ESBAUM is the author of several picture books, including Ste-e-e-e-eamboat a-Comin'!, illustrated by Adam Rex. She lives on a farm in Dixon, Iowa.