David Martin 
Why Do Animals Hibernate? [PDF ebook] 

Why Do Animals Hibernate? is aligned to the Common Core State Standards for English/Language Arts, addressing Literacy.RI.1.4 and Literacy.L.1.4. Large color photographs of dens, burrows, caves, and hibernating creatures along with narrative nonfiction text engagingly explain the world of hibernation. This book should be paired with "Good Night, Bears: Learning About Hibernation" (9781448887767) from the Rosen Common Core Readers Program to provide the alternative point of view on the same topic.