Vampire World Series by Brian Lumley

The vampires have been vanquished! Harry Keogh and the armies of the dead have destroyed the evil that once plagued the world. Nathan and Nestor, secret twin sons of the Necroscope and a proud gypsy woman, were children when their father, his humanity poisoned by his fearsome struggles, sacrificed himself to save mankind.Yet there are vampires still, vampires crueler and stranger than any the Necroscope had faced... moreThe vampires have been vanquished! Harry Keogh and the armies of the dead have destroyed the evil that once plagued the world. Nathan and Nestor, secret twin sons of the Necroscope and a proud gypsy woman, were children when their father, his humanity poisoned by his fearsome struggles, sacrificed himself to save mankind.Yet there are vampires still, vampires crueler and stranger than any the Necroscope had faced. When these new, merciless killers swoop out of the sky, Nathan and Nestor are men--but they have few of Harry Keogh's miraculous powers.Torn from each other by battle, the sons of the Necroscope journey across the vampire world, exploring its mysteries, each seeking the powerful, terrible vampires, his missing brother...and the woman they both love! less

Nestor and Nathan Kiklu are the twin sons of Harry Keogh, the Necroscope. United by blood, they also share some of their father's awesome powers--but what they do with those gifts cannot be more different!Nathan takes up the struggle against the metamorphic vampires, while Nestor, fascinated by the vampires' eerie evil, has become his twin's worst nightmare: a Wamphyri Lord!Harry Keogh's sons have become the bitterest of enemies, each determined to destroy the other... moreNestor and Nathan Kiklu are the twin sons of Harry Keogh, the Necroscope. United by blood, they also share some of their father's awesome powers--but what they do with those gifts cannot be more different!Nathan takes up the struggle against the metamorphic vampires, while Nestor, fascinated by the vampires' eerie evil, has become his twin's worst nightmare: a Wamphyri Lord!Harry Keogh's sons have become the bitterest of enemies, each determined to destroy the other. When next they meet, one will surely die! less

The twin sons of Harry Keogh, the Necroscope, have taken very different paths. Nathan as his father's powers--to talk to the dead, to travel instantly through space. Like Harry, this new Necroscope fights evil wherever he finds it.His twin, Nestor, has become the most horrifying evil imaginable: a shape-shifting, blood sucking Wamphyi Lord! Devoid of human feeling, Nestor and his companion, the beautiful, malevolent Wratha the Risen, hunt without mercy... moreThe twin sons of Harry Keogh, the Necroscope, have taken very different paths. Nathan as his father's powers--to talk to the dead, to travel instantly through space. Like Harry, this new Necroscope fights evil wherever he finds it.His twin, Nestor, has become the most horrifying evil imaginable: a shape-shifting, blood sucking Wamphyi Lord! Devoid of human feeling, Nestor and his companion, the beautiful, malevolent Wratha the Risen, hunt without mercy.The battle between the brothers mirrors the war between vampires and humans. On mankind's side: terrible weapons brought from Earth by Nathan's allies. But the vampires are numerous and powerful, and neither side has a clear advantage...until Nathan and his legions of the dead discover a way to destroy the vampires forever.In the midst of a titanic battle, Nathan makes a desperate move that forever changes millions of lives and two worlds: the vampire world...and earth. less