Fantasy

Sabaa Tahir
Ember in the Ashes, book 3. Beyond the Empire and within it, the threat of war looms ever larger as the Blood Shrike, Helene Aquilla, Laia of Serra, and Elias Veturius all face increasing dangers. Grades 9-12.
Tricia Levenseller
(Daughter of the Pireate King, #2) When the evil Vordan exposes a secret her father has kept for years, Alosa and her crew find themselves in a deadly race against the fearsome Pirate King to claim a legendary hidden treasure. Grades 7-12.
Alwyn Hamilton
(Rebel of Sands, #3) Armed with only her revolver, her wits, and the Demdji powers she's struggling to control, Amani must rally a crew of rebels to take on the bloodthirsty sultan of Miraji and free the imprisoned prince Ahmed. Grades 9-12
Sarah J. Maas
(Novella, #4) As Feyre navigates her first Winter Solstice as High Lady, she finds that those dearest to her have more wounds than she anticipated--scars that will have far-reaching impact on the future of their Court. Grades 10-12
Rick Riordan
The Greek god Apollo, cast down to earth as the ungifted human teenager Lester Papadopoulos, and his demigod friends must go through the Labyrinth to find the third emperor--and an Oracle who speaks in word puzzles--somewhere in the American Southwest. Grades 5-8.
Tomi Adeyemi
Zelie Adebola remembers when the soil of Orisha hummed with magic. Burners ignited flames, Tiders beckoned waves, and Zelie’s Reaper mother summoned forth souls. Grades 9-12
Reginald Hudlin
In the secluded kingdom of Wakanada, the Black Panther reigns supreme--until a savage villain called Klaw invades with a grudge, a super-powered army, and the support of western nations. Now the Panther must defend his homeland, his family, and his very way of life against overwhelming odds. Grades 10-12
James Tynion IV
When Jory transfers to an all-boys private high school, he's taken in by the only ones who don't treat him like a new kid, the lowly stage crew of the drama club who introduce him to the magical world that lives beyond the curtain. Gr. 6-12.
Holly Black
(The Folk of the Air, book 1) Jude, seventeen and mortal, gets tangled in palace intrigues while trying to win a place in the treacherous High Court of Faerie, where she and her sisters have lived for a decade..  Grades 9-12. 
Sarah J. Maas
(Book 6 of the Throne of Glass series.) Following the shattering of the glass castle and the deaths of his men, Chaol pursues recovery by searching for healers in the southern continent while trying to convince Dorian and Aelin to ally with him and Nesryn in order to avoid war. Grades 8-12.