The Omega's Knowledge - Anne T. Thyssen

In the mystical realm of Verocca, omegas were thought to have been lost to the world, a punishment from the Gods. However, on a tiny island, four omega princesses hide while waiting for their castle to be overrun by Tesarian Wolves, led by the powerful Alpha Cartan, who is eager to prove himself. His mission: to capture the legendary omega princesses, long believed to be mere legends.
Kiandra, the fourth princess, fiercely protective of her sisters, makes a heart-wrenching decision to become Cartan's Omega to ensure her sisters' escape. However, her preconceptions about alphas are shattered as she discovers the beauty and complexity of Cartan's world, leading to an unexpected romance.