Grylls, Bear The river challenge / Bear Grylls; illustrated by Emma McCann - London, England : Bear Grylls, 2017. - 117 p. : ill. ; 22 cm. - The Bear Grylls adventures series . ISBN: 9781786960924 Subjects--Topical Terms: Grylls, Bear -- Juvenile fictionSurvival -- Juvenile fiction.. Fear -- Juvenile fiction. Dewey Class. No.: 823.92 / G928r 2017