What are some good authors like Jeaniene Frost?

I've just finished reading the Night Huntress Novels and First Drop of Crimson by Jeaniene Frost and I LOVED them. Fantastic heroine Cat and y vampire Bones were amazing. I've also read the Sookie Stackhouse Novels by Charlaine Harris as well. I've read the Twilight Series but I want something that is more for adults; any suggestions? Thank you (-: