The Girl King by Mimi Yu

Sisters Lu and Min have always understood their places as princesses of the Empire. Lu knows she is destined to become the dynasty’s first female ruler, while Min is resigned to a life in her shadow. Then their father declares their male cousin Set the heir instead—a betrayal that sends the sisters down two very different paths.

Determined to reclaim her birthright, Lu goes on the run. She needs an ally—and an army—if she is to succeed. Her quest leads her to Nokhai, the last surviving wolf shapeshifter. Nok wants to keep his identity secret, but finds himself forced into an uneasy alliance with the girl whose family killed everyone he ever loved… Read more.