"O'Rourke brilliantly builds an intricate and complex alternate science-fiction universe...A definite page-turner full of thought-provoking discussions about morality and humanity. "
—School Library Journal
DISSONANCE: Book 1
For Delancey Sullivan, alternate universes aren't just a theory: they're a way of life. Every time someone makes a choice—to eat breakfast or skip it, to sneak out or stay in bed—parallel realities are created, and echo versions of ourselves take the roads not traveled in the Key World. As a Walker, Del navigates between the Echoes, keeping the dimensions in harmony. But when her own choices go horribly wrong, she must decide between her heart and her duty—and live with the consequences.
HARMONIC: Book 1.5
A Dissonance E-Novella
Addie Sullivan has always been the perfect Walker, but after the events of Dissonance, her loyalty is questioned. To prove herself - and protect a grief-stricken Del - she takes on a special assignment from the Consort, tracking down rebel Free Walkers. Chasing ghosts means digging into past...and asking her ex-girlfriend, Laurel, for help. As her feelings for Laurel resurface, so do troubling secrets about the Consort, the Free Walkers, and Addie's family. And when the investigation turns deadly, Addie must decide who to believe, and where her future lies.
RESONANCE: Book 2
Del risked everything to save Simon and the multiverse...but now he's gone, lost in an alternate world with no way for her to find him.
Devastated, Del tries to resume her life at the Consort, training to be a Walker like the rest of her family. But the Free Walkers, rebels with ties to her family's past, accuse the Consort of unthinkable violence.
The Free Walkers make Del the ultimate promise: join their fight against the Consort, and they'll reunite her with Simon. She's forced to choose between the boy she loves and the world she's sworn to protect - and the fate of the multiverse hangs in the balance.
"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...A fascinating and gratifying conclusion to this original and unique series."
—School Library Journal