“I haven't read anything that has moved me this much since Wonder.” —Jennifer Niven, author of All the Bright PlacesA space-obsessed boy and his dog, Carl Sagan, take a journey toward family, love, hope, and awe in this funny and moving novel for fans of Counting by 7s, Walk Two Moons, and The Curious Incident of the Dog in the Night-Time.   11-year-old Alex Petroski loves space and rockets, his mom, his brother, and his dog Carl Sagan—named for his hero, the real-life astron