The list is in no particular order. The series I have listed may contain a few books that are less than addictive, but most of the books in these series are highly addictive.
Riley Jensen, Guardian by Keri Arthur
Mercy Thompson by Patricia Briggs
Immortals After Dark by Kresley Cole
Lords of the Underworld by Gena Showalter
ACRO by Sydney Croft
Night Huntress by Jeaniene Frost
The Hollows by Kim Harrison
Demonica by Larissa Ione
Guardians of Eternity by Alexandra Ivy
Dark-Hunter by Sherrilyn Kenyon
Twilight by Stephanie Meyer
Hunger Games by Suzanne Collins
Argeneau Vampires by Lynsay Sands
Tales of an Extraordinary Girl by Gena Showalter
Love at Stake by Kerrelyn Sparks
Black Dagger Brotherhood by JR Ward
Morganville Vampires by Rachel Caine
Darkness Within by Jennifer Turner
The Caster Chronicles by Kami Garcia and Margaret Stohl
The League by Sherrilyn Kenyon
The Dark Ink Chronicles by Elle Jasper
Sinners on Tour by Olivia Cunning
Providence by Jamie McGuire
Fifty Shades by EL James
Lords of Deliverance by Larissa Ione