Copper and Smoke is book two in the Water-Folk Saga by Victoria Ravenwood. It's an adventurous YA fantasy filled with friendship, pirates, and magical books.
Scythe is the first novel in the Arc of a Scythe Trilogy by Neal Shusterman and introduces us to two youngers who - unwillingly - train to become Reapers.
The Even the Darkest Stars duology by Heather Fawcett is a delightful YA fantasy tale about royal explorers, filled with adventures, love, and betrayal.
Girls of Paper and Fire by Natasha Ngan is an intriguing YA Fantasy series about forbidden love, magic and the strength to fight for what you believe in.