"She never understood the point of romance, but now he's going to show her." Lucy London is a genius. Having obtained her Ph.D. in microbiology by the age of twenty she's amassed a wealth of knowledge, but one subject still eludes her people.. The pendulum of passions experienced by those around her confuses and intrigues her, so when she's offered a grant to study emotion as a pathogen, she jumps on the opportunity. Enter Jensen Walker, Lucy's neighbor and the one person she finds appealing. Jensen's life is the stuff of campus legends, messy, emotional, and complicated. Basically, the perfect starting point for Lucy's study. When her tenaciousness wears him down and he consents to help her, sparks fly. To her surprise, Lucy finds herself battling with her own emotions, as foreign as they are intense. With the clock ticking on her deadline, Lucy must decide what's more important: analyzing her passions-or giving in to them?"

I fell in love with Amie when I was ten years old. At sixteen, we whispered promises of forever. When I was twenty-two I broke them all. I did the one thing that I promised her I wouldn't do. I left her and promised to never return.