Zero sum game
Cas Russell possesses an extraordinary mathematical ability that allows her to predict and manipulate outcomes, making her a formidable force. She believes she's unique until she encounters someone with an even more dangerous power: the ability to twist minds. This new adversary seeks to control the world, and Cas finds herself drawn into a conflict where she can no longer trust her own thoughts.
While each book in the Cas Russell series features a self-contained mystery, the overarching character development and relationships build across the series. Reading them in publication order will provide the most satisfying experience of Cas's journey.
S. L. Huang's professional background as a stunt performer and her expertise in mathematics are deeply integrated into the novel, informing the precise, action-packed fight sequences and Cas Russell's extraordinary mathematical abilities.