Sally M. Walker studied geology and is the author of many non-fiction books, including Secrets of a Civil War Submarine, which won the Sibert Award. She lives in Illinois.William Grill is the author-illustrator of Shackleton's Journey, a New York Times Best Illustrated Children's Book of the Year and winner of a Kate Greenaway Medal. He lives in London.

“[in] a series of elegant, resonant haiku, [Sally M Walker] lays out the essentials of earth science, communicating, with inexorable calm, how vulnerable humans remain to changes in their great habitat.”

Sally M. Walker studied geology and is the author of many non-fiction books, including Secrets of a Civil War Submarine, which won the Sibert Award. She lives in Illinois.William Grill is the author-illustrator of Shackleton's Journey, a New York Times Best Illustrated Children's Book of the Year and winner of a Kate Greenaway Medal. He lives in London.

“[in] a series of elegant, resonant haiku, [Sally M Walker] lays out the essentials of earth science, communicating, with inexorable calm, how vulnerable humans remain to changes in their great habitat.”

Sally M. Walker studied geology and is the author of many non-fiction books, including Secrets of a Civil War Submarine, which won the Sibert Award. She lives in Illinois.William Grill is the author-illustrator of Shackleton's Journey, a New York Times Best Illustrated Children's Book of the Year and winner of a Kate Greenaway Medal. He lives in London.

“[in] a series of elegant, resonant haiku, [Sally M Walker] lays out the essentials of earth science, communicating, with inexorable calm, how vulnerable humans remain to changes in their great habitat.”