Polar Bear Puzzle is part of the Adventures of Riley series by Amanda Lumry and Laura Hurwitz, endorsed by the Smithsonian Institute and the World Wildlife Fund. This series is really creative in that it mixes photographs with drawn illustrations, and stories with non fiction facts. For instance in Polar Bear Puzzle Riley goes to visit his biologist uncle Max in Churchill Canada, Polar Bear Capital of the world. Due to climate change, Uncle Max must tag and transfer bears to colder parts of the country, and Riley gets to help! On the way they meet several other arctic animals, and even see the northern lights. This is a very cool book with tons of timely information.