As a Walker between worlds, Del is responsible for the love of her life—and the fate of millions—in this thrilling sequel to Dissonance . Del risked everything to save Simon, and now he’s gone, off in another world with no way for Del to find him. She’s back at the Consort—training to be a Walker like everyone in her family. But the Free Walkers have other plans for her. This rebel group is trying to convince Del that the Consort is evil, and that her parents are unwittingly helping the Consort kill millions of people. The Free Walkers make Del the ultimate promise: if Del joins their fight, she will be reunited with Simon. In agreeing, Del might be endangering her family. But if she doesn’t, innocent people will die, and Simon will be lost to her forever. The fate of the multiverse depends on her choice... “O’Rourke brilliantly builds an intricate and complex alternate science-fiction universe…fans will be longing for the next installment.” — School Library Journal Gr 9 Up—Delancey Sullivan's world has just been turned upside down. She is a walker, someone with the genetic ability to travel to parallel worlds. Walkers working for the Consort maintain order and balance between these multiple universes and the original Key World to ensure harmony for all. Del has been raised to believe that the Consort's main purpose in cleaving a parallel world and its echoes is to make the Key World stronger and more stable. As it turns out, not all is at it seems. Del learns from the Free Walkers, a rebel group trying to expose the Consort, that much of what she has been taught is lies designed to keep the Consort in power. When the love of her life, Simon, a half-Walker and echo, is lost in a cleaving, Del is devastated. Soon after, she finds out that Simon is not lost and the Free Walkers can reunite them. But the price is high—she must join them and go against the Consort, her family, her friends, and all she has known. In this sequel to Dissonance (S. & S., 2014), O'Rourke once again captivates readers with an intricate and complex alternative universe that is full of suspense and intrigue. Such descriptive and vivid writing not only drives the action-packed plot, but makes the link between the musical threads and science of free walking easy to visualize. Some strong new characters are added to the mix, allowing questions about a person's worth, honor, and value to be explored. VERDICT A fascinating and gratifying conclusion to this original and unique series.—Donna Rosenblum, Floral Park Memorial High School, NY Erica O’Rourke is the author of Dissonance , Resonance , and the Torn trilogy, which includes Torn , Tangled , and Bound . She lives near Chicago with her family. Visit her at EricaORourke.com and on Twitter: @Erica_ORourke. Resonance CHAPTER ONE Days until Tacet: 25 WHEN I WAS LITTLE, MY grandfather told me nothing was impossible. Given enough time and the right choices, anything could happen. I believed him. Then I grew up. I stopped believing. Turns out, he was right. • • • Walking between worlds turns you invisible. Echoes don’t notice you until you touch one of them, so people are forever looking past you. You’re a vague impression, more sensed than seen, a flicker in their peripheral vision. Invisibility suited me fine. Coming here was a risk; I wasn’t allowed to Walk unaccompanied, and there was always a chance an Original would spot me crossing. But some things you need to see—or hear—to believe. I hovered like a ghost at the edge of the crowded hallway. But when Simon Lane came around the corner, dark hair falling into blue eyes, jaw square and stubborn, smile full of trouble . . . I knew I was the one being haunted. Pain roared through me, hungry as a wildfire. Not my Simon, though the pitch of this world was sharp and familiar. An Echo of him, and one I knew well: the shape of his hands fitted with mine; the feel of his mouth against my throat; the lazy, prowling movements that made my knees go weak. Doughnut Simon—as vibrant and magnetic as his Original—should no longer exist. The sound of him reached me clearly, despite the distance and bodies between us. The same frequency as the rest of the Echo, but stronger, as if his volume was turned up to eleven when everyone else was a ten. He should have been silent. A terminal Echo, one whose Original had died. A little more than a week ago, his Original had trapped himself in a world unraveling to nothingness to save me and the rest of the multiverse. His death in the cleaving should have unraveled his Echoes, robbing them of their frequency and their lives. This Simon should have been silent, but his pitch was true as ever. The only explanation was that my Simon had survived the cleaving. He’d escaped, somehow, into the vastness of the multiverse. Impossible. Hope beat in my chest, the faintest of wings. I tried to smother it, but hope feeds on the impossible as surely as grief feeds on memory. Sim