6) Julie Kagawa
The Iron King
The Iron Daughter
The Immortal Rules
The Eternity Cure
The Forever Song
Talon
Side Note: I will be reading the rest of the Iron Fey series, just haven't got the chance yet.
5) Stephenie Meyer
Twilight
New Moon
Eclipse
Breaking Dawn
The Short Second Life of Bree Tanner
The Twilight Saga: The Official Illustrated Guide
The Host
4) Rachel Vincent
My Soul to Take
My Soul to Save
My Soul to Keep
My Soul to Steal
If I Die
Before I Wake
Stray
Rouge
3) Cassandra Clare
City of Bones
City of Ashes
City of Glass
City of Fallen Angels
City of Lost Souls
City of Heavenly Fire
Clockwork Angel
Clockwork Prince
Clockwork Princess
The Bane Chronicles
2) Melissa de la Cruz
Blue Bloods
Masquerade
Revelations
The Van Alen Legacy
Misguided Angel
Lost in Time
Gates of Paradise
Bloody Valentine
Keys to the Repository
Vampire's of Manhattan
Witches of East End
1) Jennifer L Armentrout
Half-Blood
Pure
Deity
Apollyon
Sentinel
Wicked
Obsidian
Onyx
Opal
Origin
Opposition
Shadows
White Hot Kiss
Stone Cold Touch
The Return
Wait for You
Trust in Me
Be with Me
Wait for You
These are my most read but that does not mean they are my favorite authors at all. Just thought I'd add that.