London, C. Alexander.

Endurance / Tides of war : endurance C. Alexander London. - New York : Scholastic , 2015. - 199 pages ; 20 cm - Tides of war ; book four .

"Ryan Keene and his sea lion, Hansel, are members of the US Navy's Marine Mammal Program, which sounds exciting but rarely involves any real danger. Mostly they are responsible for recovering lost objects from the ocean floor. That all changes they travel to the perilous Arctic, where polar bears stalk the ice and killer whales prowl the water. But even at the ends of the Earth, the most dangerous predator is man." --Back cover.

ISBN: 9780545800815 (softcover) 0545800811

Subjects--Topical Terms:
Sea lions
Human-animal relationships

LC Class. No.: AG243 / .G437 2014