Chimera

In "Chimera" by Rob Thurman, a gripping sci-fi thriller, Stefan Korsak has spent a decade haunted by the kidnapping of his younger brother, Lukas. As a key figure in the Russian mafia, he finally recovers Lukas, only to discover that his brother has been transformed into a genetically-altered killer. Now pursued by those who engineered this change, Stefan must navigate the complexities of loyalty and survival as he confronts the dark reality of what Lukas has become.