Silver in the Bone by Alexandra Bracken
This book is phenomenal! I finished this so fast because I just couldn't put it down. The characters are beautifully written and the world building is fantastic.
Tamsin is a Hollower someone who searches for lost magical artifact's but unlike most Hollowers she is not blessed with the one sight allowing her to see the magic around her. She is merely human unlike her brother Cabell who possess magic that allows him to counter curses to keep them safe. After being abandoned by their adopted father they have to find a way to take care of themselves. Rumor starts to swirl that their adopted father disappeared with a powerful Aurthorian ring made to break the most powerful curses. So Tamsin and Cabell go in search of the ring but along the way they pick up Emrys, Tamsin’s rival. Emrys ends up being a blessing in disguise so together they go in search of the ring. Facing untold dangers along the way they learn secrets they never expected to uncover.