Lets see I read a few good ones over the last year or so....
The Other Boleyn Girl, The constant princess and The Queen's Fool - Philipa Gregory they were all really good. The other Boleyn girl was the best though! (kind of a series although each stands alone) - about King Henrys court! bunch of bad girls and boys! hehe
The Odd Thomas Series by Dean Koontz,
Odd Thomas, Brother Odd and Forever Odd. Now there are 2 more in the series woohoo

- they are freaky in a way, koontz is a lot like stephen king except not so detailed.
The Circle Trilogy by Nora Roberts -
Morrigan's Cross, Dance of the Gods, Valley of Silence - a romance/vampire/mystical series - pretty good.
Then of course the Twilight Series - Stephanie Meyer -
Twilight, New Moon, Eclipse and Breaking Dawn another vampire/love series - I love vampire books, these are good vampires though - vegetarians if you will who do not feed off humans and who have emotions. Can't wait for the movie in Dec
Think I have a series theme going on here?? haha