Written by environmentalist Casson Trenor, Umijoo: The Wondrous Tale of a Curious Girl and her Journey Under the Sea, is a story about love, responsibility, and balance. Umijoo aims to educate and inspire a new generation of ocean defenders. About Casson Trenor: Casson Trenor is a strategic campaigns expert that specializes in environmental causes, most notably ocean conservation. He has spent many years working on environmental campaigns. In recognition of his ocean conservation efforts,