Blackbird Trilogy Series by Heather Graham

When darkness falls, there’s nowhere to hide. Four bodies have been discovered along Europe’s riverbanks, placed with care—and completely drained of blood. Pinpricks on their throats indicate a slender murder weapon, but DNA found in the wounds suggests something far more sinister. Tasked with investigating, the FBI recruits Agents Della Hamilton and Mason Carter to Blackbird, an international offshoot of the Krewe of Hunters... moreWhen darkness falls, there’s nowhere to hide. Four bodies have been discovered along Europe’s riverbanks, placed with care—and completely drained of blood. Pinpricks on their throats indicate a slender murder weapon, but DNA found in the wounds suggests something far more sinister. Tasked with investigating, the FBI recruits Agents Della Hamilton and Mason Carter to Blackbird, an international offshoot of the Krewe of Hunters. If you want to catch a vampire killer, you need agents who can speak with the dead.   The pair travel to Norway, where the shadowy forests of Lillehammer reveal a gruesome scene. The killer is thirsty for more victims, and the bloodless trail soon leads Della and Mason to a group that believes drinking blood is the key to immortality. To catch the culprit of such an intimate crime, the agents will have to get close. Mason’s already lost one partner; he’s not ready to risk Della as bait. But sometimes justice requires a sacrifice…The Blackbird TrilogyBook 1: Whispers at DuskBook 2: Secrets in the DarkBook 3: Cursed at Dawn less

Over a century after Jack, a new Ripper is on the loose.   Following in the footsteps of notorious serial murderer Jack the Ripper, a killer is stalking the streets of London. The self-dubbed Ripper King strikes at night, leaving a trail of eviscerated bodies in his wake. Fresh off a case with potential ties to the recent rash of killings, FBI agents Della Hamilton and Mason Carter are all too familiar with a slayer set to rule with a lethal fist. And they’ll stop at nothing to end his reign... moreOver a century after Jack, a new Ripper is on the loose.   Following in the footsteps of notorious serial murderer Jack the Ripper, a killer is stalking the streets of London. The self-dubbed Ripper King strikes at night, leaving a trail of eviscerated bodies in his wake. Fresh off a case with potential ties to the recent rash of killings, FBI agents Della Hamilton and Mason Carter are all too familiar with a slayer set to rule with a lethal fist. And they’ll stop at nothing to end his reign. The killer’s MO may be nothing new, but his desire to be infamous makes him dangerous. Della and Mason know it’s only a matter of time before their investigation emboldens this new Ripper, forcing the agents to work quickly before another woman winds up dead. But now that the heat is on, their game of cat and mouse takes an unexpected turn, leading Della and Mason into a deadly trap they never saw coming…The Blackbird TrilogyBook 1: Whispers at DuskBook 2: Secrets in the DarkBook 3: Cursed at Dawn less