Arsenic for the Soul horror novel by author Nathan Wilson

Vivian Xu and Camilla Vesely’s dreams couldn’t be any closer. Their futures seem to entwine until Camilla receives a menacing message regarding her bloodline. Soon after, Vivian follows a trail of mysterious threats, a family ancestry buried in deceit, and a string of killings that draw nearer to the ones she loves.
 

She may be the only safeguard left standing between a murderous fanatic and the livelihood of Prague. If only Vivian's deepest desire wasn't placing everyone around her in immediate peril.

Red Widow
All Her Wounds
Death Perfected