by Lucy Hawking
First published 2018
When best friends George and Annie are selected for a junior astronaut program, they're over the moon. But their excitement turns to alarm as they discover a mysterious blue rock with otherworldly properties. Now, they must race against time to uncover its secrets before a shadowy organization beats them to it. Can these young space explorers save the day—and maybe even the whole planet?
Genres: science-fiction, adventure, mystery
Vibes: fast-paced, suspenseful, thought-provoking
Tropes: found-family, race-against-time
336 pages · Paperback · Simon & Schuster Books for Young Readers