Julie Bertagna

"This is the story of John Muir's adventurous life, from his wild and playful boyhood in Scotland to his legendary exploits in America, where he became an inventor, a global explorer, and the first modern environmentalist--and even made friends with a president! His heart was always in the outdoors and he aimed to experience all he could. He swung through a windstorm at the top of a tall tree, clilmbed too many mountains to count, and rode an avalanche...

In the year 2100, as the island of Wing is about to be covered by water, fifteen-year-old Mara discovers the existence of New World sky cities that are safe from the storms and rising waters, and convinces her people to travel to one of these cities in order to save themselves.