5) The Vampire Diaries - L.J Smith
(This is kind of cheating since the last one I read was Return: Midnight, which isn't officially the end but shush it was good)
4) The End - Lemony Snicket (A Series of Unfortunate Events)
3) Mockingjay - Suzanne Collins
2) Harry Potter and the Deathly Hallows - J.K Rowling
1) The Color Purple - Alice Walker
(I cheated again, since this isn't a series but none of you picked up on it, WINK WINK)