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Written by Melissa Stewart
Written by Bonnie WorthIllustrated by Aristides Ruiz and Joe Mathieu
Written by Mary Pope Osborne and Natalie Pope BoyceIllustrated by Sal Murdocca
Written by Laura Marsh
Written by Elizabeth Carney
Written by Bonnie Worth
Written by Bonnie WorthIllustrated by Aristides Ruiz
Written by Flip Nicklin and Linda Nicklin
Written by Johnna RizzoIntroduction by Sylvia A. Earle
Written by Ruth Musgrave
Written by Nicola DaviesIllustrated by Jane Chapman
Written by Tish RabeIllustrated by Christopher Moroney
Written by National Geographic
