I'd recommend:
* Anything by Dee Henderson (writes a sort of Christian suspense/romance type book...has two series out)
* Anything by Iris Johansen (I started reading her books with The Killing Game, and I'm actually now reading some of her earlier books that came before that)
*Nora Roberts either as Nora Roberts or J.D. Robb (Robb books are a futuristic suspenseful romantic novel...do you sense a theme here?

)
* Meg Cabot (Yes, The Princess Diaries are great, but she also has a couple of books out written in the manner that t*p was talking about being entirely in the form of emails among co-workers and such)
*Karin Slaughter (mainly suspense novels....can be very graphic, but are VERY hard to put down!)
I may think of more....can you tell how I spend my time????