More like The Merging

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The Mortal InstrumentsUniverse
universe70 books2007
Fantasy.
“There is a world laid over your own like a second skin, and you have been trained since birth not to see it.”
from the catalogue
Start with City of Bones →
includes The Dark Artifices, The Eldest Curses, Magnus Bane, Ghosts of the Shadow Market, The Last Hours, The Infernal Devices, Tales from the Shadowhunter Academy
Anita BlakeSeries
series42 books1993
Dark and tense in tone, about vampires.
“The books have sold more than six million copies; many have made The New York Times Best Seller list.”
from the catalogue
Start with Guilty Pleasures →
The Dresden FilesSeries
series56 books2000
About wizards.
“The novels are narrated from the first-person perspective of Harry Dresden, a private detective and wizard, as he investigates supernatural disturbances in contemporary Chicago.”
from the catalogue
Start with Welcome to the Jungle →
Kitty NorvilleSeries
series62 books2001
About werewolves.
“The program focuses on supernatural issues, beings and creatures she encounters.”
from the catalogue
Start with Doctor Kitty Solves All Your Love Problems →
The HollowsSeries
series39 books2004
About witches and demons.
Start with Of Vampires—Living and Not So Living →
The Morganville VampiresSeries
series40 books2006
completed
Tense in tone, about vampires, set in small town.
“The novels feature Claire Danvers, a student at Texas Prairie University, and her housemates in the vampire-controlled city of Morganville, Texas.”
from the catalogue
Start with Glass Houses →