'Audaciously tackles life's most formative experiences: love and loss' RUMAAN ALAM, New York Times bestselling author of Leave the World Behind 'Like walking down a hall of mirrors . . . Lightbreakers made me see things anew' LING MA, prize-winning author of Severance 'You will love this genre-busting book . . . A cross of literary fiction and sci-fi, it's also a beautiful meditation of grief, time, and love' SAMIN NOSTRAT, bestselling author of Salt Fat Acid Heat Maya, an artist, and Noah, a quantum physicist, are happily married. But beneath the surface of their wedded bliss is a third rail: Serena, the lost child that Noah had with his ex-wife. When Noah gets a call from an eccentric billionaire asking him to participate in a clandestine project aiming to unravel the secrets of time and consciousness, the couple agrees to relocate to the Janus Lab, deep in the desert, and Noah finds himself drawn into a dangerous kind of time travel that could result in seeing Serena again. But