Boots Mackovich P.I. : Relentless - Boots Mackovich P.I., #2

For private investigator Elizabeth Boots Mackovich, taking down crime lord Lyle Kraven was supposed to be just another mission in her relentless crusade against the underworld. But when a failed ambush leaves her friend, Detective Louis Mansetti, clinging to life and Kraven's operation shattered, Boots uncovers something far more insidious lurking in the shadows. Kraven wasn't just trafficking guns and women-he had made a deadly pact with an inhuman force. The hybrid creatures Boots once encountered in Brentwater, subjects of a secret experiment she barely survived, are back.
And now, the alien-human hybrids have a new directive: Eradicate Subject: 121. Boots. Hunted by the Triad, a lethal group of hybrids sent by their Supreme Council to erase her from existence, Boots is forced to confront a terrifying truth-her battle with Kraven was only a stepping stone in a much larger war for humanity's future. With the help of tech genius Seymour Ross and the reluctant support of mob boss Enrico Cordoba, she must face down the hybrids and destroy their shadowy overlords before they can erase not only her, but everyone she cares about.
As her enemies close in, Boots will have to decide how far she's willing to go to stop them-and if the pursuit of justice is worth the cost of her own humanity. The hunt for Kraven led her back into a nightmare she thought she'd escaped. But this time, she's not running.