New York Times bestseller * Best Book of the Year from The Washington Post,Publishers WeeklyNew York Public LibraryChicago Public Library The One and Only Ivan meets The Wild Robot in this unique and deeply moving middle grade novel about the journey of a fictional Mars roverfrom the Newbery Honor-winning author of Other Words for Home. Meet Resiliencea Mars rover determined to live up to his name. Res was built to explore Mars. He was not built to have human emotions. But as he learns new things from the NASA scientists who assemble himhe begins to develop humanlike feelings. Maybe there’s a problem with his programming…. Human emotions or notlaunch day comesand Res blasts off to Marsaccompanied by a friendly drone helicopter named Fly. But Res quickly discovers that Mars is a dangerous place filled with dust storms and giant cliffs. As he navigates Mars’s difficult landscapeRes is tested in ways that go beyond space exploration. As millions of people back on Earth follow his progresswill Res have the determinationcourageand resilience to succeed… and survive?