An unwinnable war. As the mysterious Angeloi intensify their attacks against the Mountain Circle, Layla and Costi must figure out who is aiding their enemies before it’s too late. Trapped with their supplies dwindling and their leadership in turmoil, they race the clock to unravel the plot and gather their allies. When the secrets of Inperium are finally revealed, it becomes clear just how personal this ancient fight really is. An immovable love. Caught between the rules of witch society and the relentless threats from Grey and his followers who seek to tear Costi away from her, Layla’s love is put to the ultimate test. Because another question remains unanswered— who is Costi Blackthorn? And the revelations shake the Circle to its foundations. The truth is worse than they ever imagined. But fate brought them together for a reason. And they will not be separated. The third and final book in the now complete series, the Spell Caster's Familiar trilogy: a slow burn paranormal romance set in a hidden witch society in the modern world.