This book is on pre-order until release date of October 11 and book delivery arrives. 
 
House of Darkness (Fallen Stars #1) by Hypatia Rhodes:
 
Estrella is special in all the wrong ways. Gifted—or cursed—with the ability to reproduce with vampires, she becomes a prized asset in a world ruled by bloodthirsty monsters. When the Vampire Tsar, Roman, decides she’s worth the investment, her dreams of freedom seem forever out of reach. Yet Roman is not what she expected. In a daring move, Estrella strikes a deal to buy her freedom, only to find her desires shifting as she grows closer to the preternaturally alluring Tsar and his powerful family.

Haunted by the loss of his beloved mother and burdened by the weight of his past, Roman struggles to embrace his role as the youngest Tsar in history. Determined to atone for the atrocities committed by his kind, he sets out to rescue Estrella from a life of enslavement and abuse. But as their worlds intertwine, he finds himself falling hopelessly in love with her. Amidst rising dissent and a nostalgic yearning for the brutal ways of old, Roman must confront the darkness within himself to protect Estrella and humankind from a fate far worse than death.

In The House of Darkness, immerse yourself in a world where power, grief, and the seduction of darkness intertwine, revealing the strength forged in the crucible of trauma.