This book tie-in to National Geographic's ambitious 5-year ocean initiative—focusing on overfishing—is written in National Geographic Explorer-in-Residence Sylvia Earle's accessible yet hard-hitting voice. Through compelling personal stories she puts the current and future peril of the ocean and the life it supports in perspective for a wide public audience. | World Is Blue The by Sylvia A. Earle, Paperback | Indigo Chapters