I've read into a couple books in this series, but...sorry I'm just not that impressed with them. Bella to me is just too much of a throwback to the "oh, male hero of the story will save me because I'm just a helpless Mary Jane silly female".
I was intrigued with the premise of the The Host. Plot (as listed on amazon.com) - A species of altruistic parasites has peacefully assumed control of the minds and bodies of most humans, but feisty Melanie Stryder won't surrender her mind to the alien soul called Wanderer. Overwhelmed by Melanie's memories of fellow resistor Jared, Wanderer yields to her body's longing and sets off into the desert to find him. Likely the first love triangle involving just two bodies, it's unabashedly romantic, and the characters (human and alien) genuinely endearing.