These books are non-fiction, paired by topics so children can learn to read and compare two books on the same topic.

DK Readers:  Diving Dolphins by Karen Wallace

National Geographic Kids Dolphins by Melissa Stewart        

DK Readers:  Snow Dogs by Jim Whitelaw

National Geographic Kids Polar Bears by Laura Marsh

DK Readers:  Disasters at Sea by Andrew Donkin

National Geographic Kids Titanic by Melissa Stewart        

DK Readers:  Whatever the Weather by Karen Wallace

National Geographic Kids Storms by Miriam Goin

DK Readers:  Animal Hospital by Judith Hodge

National Geographic Kids Saving Animal Babies by Amy Shields

DK Readers:  Volcanoes and Other Natural Disasters by Harriet Griffey

National Geographic Kids Volcanoes by Anne Schreiber

DK Readers:  Big Machines by Karen Wallace

National Geographic Kids Trucks by Wil Mara

DK Readers:  Journey of a Humpback Whale by Caryn Jenner

National Geographic Kids Great Migration of Whales by Laura Marsh

Fire! Fire! By Gail Gibbons

Firefighters A to Z by Chris Demarest