King of Scars (King of Scars Duology) by Leigh Bardugo
SF TEEN BARDUGO
When the dark magical force within him challenges his effort to forge new alliances and build a defense against a new threat, Nikolai Lantsov, the young king of Ravka, embarks on a journey to his country's most magical places to vanquish it.
The Scorpion Rules (Prisoners of Peace) by Erin Bow
SF TEEN BOW
The teenage princess of a future-world Canadian superpower, where royal children are held hostage to keep their countries from waging war, falls in love with an American prince who rebels against the brutal rules governing their existences.
Honor Among Thieves (Honors) by Rachel Caine, Ann Aguirre
SF TEEN CAINE
Petty criminal Zara Cole has a painful past that's made her stronger than most, which is why she chose life in New Detroit instead moving with her family to Mars. In her eyes, living inside a dome isn't much better than a prison cell. Still, when Zara commits a crime that has her running scared, jail might be exactly where she's headed. Instead Zara is recruited into the Honors, an elite team of humans selected by the Leviathan, a race of sentient alien ships, to explore the outer reaches of the universe as their passengers.
Dance of Thieves by Mary E. Pearson
SF TEEN PEARSON
A formidable outlaw family that claims to be the first among nations. A son destined to lead, thrust suddenly into power. Three fierce young women of the Rahtan, the queen's premier guard. A legendary street thief leading a mission, determined to prove herself. A dark secret that is a threat to the entire continent.
Mortal Engines (Mortal Engines, Book 1) by Philip Reeve
SF TEEN REEVE
In the distant future, when cities move about and consume smaller towns, a fifteen-year-old apprentice is pushed out of London by the man he most admires and must seek answers in the perilous Out-Country, aided by one girl and the memory of another.
Carry On: A Novel (Simon Snow Series) by Rainbow Rowell
SF TEEN ROWELL
Simon is the most powerful magician the world has ever known, he never gets to relax and savor anything.During his last year at Watford School of Magicks, Simon Snow, the Chosen One, faces a magic-eating monster wearing his face, a break-up, and a missing nemesis.
Leviathan (The Leviathan Trilogy) by Scott Westerfeld
SF TEEN WESTERFELD
In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically-engineered beasts.