The Shrouded Queen by Ashley Tropea

In the first book in this romantasy duology inspired by ancient Egyptian mythology, a slave and a princess switch places during an enemy attack, igniting parallel journeys of love and survival. As a slave to the Ashoran royals, Samira has always known she was expendable. So when the vicious Kaldfolk attack the palace, she is ready to die as a decoy for her princess. But when she’s captured instead, she’s forced to impersonate the princess and survive through brutal trials designed to awaken her divine powers—all under the watch of her dangerously intriguing, shape-shifting captor. Amunet Khada—now queen of Ashorah—is on the run following the king’s death. With only her guard-with-benefits, Jasim, by her side, she must evade treacherous allies while racing to contact her father—the god of the underworld—before her long-promised powers slip beyond reach. While Amunet embarks on a quest through the wastelands, Samira learns the true reason for the attack and unlocks secrets in her past that could change everything. And with threats growing on all sides, Samira and Amunet must decide...who can they trust?