Bloodlines (The Guardian of Empire City Book 1)

When former hotshot homicide detective Tom "Doc" Holliday is recruited to join Special Crimes, he trades in his boring desk job for a second chance to do what he does best, hunt down killers. And his first case doesn't disappoint: a murdered woman with a bogus past, her body drained of blood, and two eyewitnesses wasted on the designer drug goldjoy claiming a vampire did it.
For Holliday is no stranger to the unusual. He wields the Insight, a fickle clairvoyance that allows him to see the dark and terrible things that hide upon his world. After all, when you live in Empire City, where magic and technology co-exist, and humanity endures behind walls of stone and spell-forged steel, anything is possible.
Saddled with a team whose past is as checkered as his own, Holliday embarks upon an investigation that pits them against bio-engineered vampires, interdimensional parasites and the magical masterminds behind it all.
From nightclubs and skyscrapers, to underground drug labs and coffee shops, Holliday's search for the truth will uncover a shadowy conspiracy that spans the ages, and forces him to confront a destiny he never wanted.