What do you do when the world stops making sense? If you're Ada Wood, you build a supercomputer. Thirteen-year-old Ada has never met a problem she couldn't take apart and figure out. So when she stumbles on an idea from her favorite book—that somewhere out there a supercomputer could calculate the meaning of life—she decides to build one herself. A real one. From scratch. In her basement. She just needs her best friend Max, her sharp-eyed Aunt Lizzie, a very good dog named Falkor, and a crash course in everything from binary code to the oldest unsolved problem in mathematics. Because underneath the wires and code is the one question Ada actually wants answered—the one about her mom, and the reason her house has felt so quiet lately. Building the machine might be the hardest thing she has ever done. Or it might be the thing that finally brings her family back together. A funny, big-hearted adventure about curiosity, friendship, and discovering that broken pieces can come back together stronger than they ever were whole.