A New York Times Bestselling Author
A Newbery Honor-Winning Author
Cora hasn't spoken to her best friend, Quinn, in a year. Despite living next door to each other, they exist in separate worlds of grief. Cora is still grappling with the death of her sister in a school shooting, and Quinn is carrying the guilt of what her brother did. On the day of Cora's twelfth birthday, Quinn leaves a box on her doorstep. She has decided the only way to fix things is to go back in time to the moment before her brother changed their lives forever. So the two former friends begin working together to open a wormhole. But as they attempt to unravel the mysteries of time travel to save their siblings, they learn that the magic of their friendship may actually be the key to saving themselves.