"The Covenant Series" is a young adult fantasy series written by Jennifer L. Armentrout. It follows the story of Alexandria "Alex" Andros, a half-blood who struggles to fit into a world divided between pure-bloods and half-bloods. The series explores themes of love, loyalty, and the fight against destiny as Alex trains to become a Sentinel and protect her loved ones. The series consists of five main books, starting with "Half-Blood" and concluding with "Sentinel." It features a mix of action, romance, and supernatural elements, drawing inspiration from Greek mythology. The engaging characters and fast-paced plot have made it popular among fans of the genre.