Book excerpt: Discover the wonder and science behind fog in this stunning and immersive nonfiction picture book from award-winning author and photographer April Pulley Sayre. Damp and drippy, misty and mysterious…fog is fascinating. Step inside this natural phenomenon and see how fog is formed, how it clears away, and why it feels chilly. Young readers will love this lyrical and gorgeously photo-illustrated exploration of these clouds that come to visit.