The Assassin

A long time ago, a young princess was kidnapped by assassins. Instead of killing her, they decide to raise her as their own. Now, after being enlisted to portray as a maid for the princess, she realizes that the long lost princess seems awfully familiar.

The first book in The Assassin Trilogy

cover credit: @CoderBee22 (also known as the girl who's designed all three covers in this trilogy!)