When the doors between worlds begin to crack, monsters slip through. Thalia Greengate has spent her life hunting them, her uncanny four-second foresight the only thing standing between the Vailwalker stronghold and chaos. She follows the rules. She keeps her distance. And she never, ever trusts an heir. Damon Vassilis has been trained to lead, but not to share command. When a rift unleashes something too dangerous for either of them to face alone, Damon and Thalia are forced into a reluctant partnership. Every step toward victory uncovers secrets about their bloodlines, their enemies, and the gods who play games with mortal lives. Sparks fly between them, whether from clashing tempers or something far more dangerous. But as shadows spread across the realms, one truth becomes clear: winning the war may cost them everything... including each other. Perfect for fans of enemies-to-allies banter, slow-burn tension, and high-stakes fantasy, Sparks and Shadows is the unforgettable beginning to the Vailwalker saga