Firefly & Fern

Yann Arthus-Bertrand

Ages 8–16environmental conservationsustainable development

Catherine Barr

Ages 4–8environmental protectionnature

Lynn M. Zott

Ages 10–16environmental protectionsustainability

Chris Eboch

Ages 8–13environmentalismsustainability

John Woodward

Ages 8–14environmental scienceclimate awareness

Ages 8–12environmental scienceecology

Mary Colson

Ages 8–12natureenvironmental conservation

Paul C. Challen, Bobbie Kalman

Ages 8–14environmental conservationclimate awareness