Discusses how the ocean changes as it goes deeper, how deep sea animals survive in harsh environments, and more.

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures.

"From New York Times bestselling author Susan Casey, an awe-inspiring portrait of the mysterious world beneath the waves, and the men and women who seek to uncover its secrets For all of human history, the deep ocean has been a source of wonder and terror, an unknown realm that evoked a singular, compelling question: What's down there? Unable to answer this for centuries, people believed the deep was a sinister realm of fiendish creatures and deadly...

"Follow Rothman's inquisitive mind and engaging artwork along shorelines, across the open ocean, and below the waves to explore the hows and whys of the watery universe, from how the world's oceans formed to why the sea is salty"--

"Amazing things happen under the Earth's waters: the sea glows mysteriously at night, the smallest organisms (plankton) have the greatest power, and the fish, which seem so taciturn, communicate with each other loudly. In Blue Wonder, Frauke Bagusche, a German marine biologist, takes us on a fascinating dive beneath the ocean to recount her personal experiences with the world's smallest and largest creatures, explaining, for example, the origins of...