Fearless and flirtatious, Megan Porter isn't your typical math major. On the fast track to graduating with honors, a spot in her school's masters program is nearly guaranteed. But her senior year is quickly turned upside-down by her new thesis advisor, cryptography professor Dr. Nick Muramoto. Young, effortlessly good-looking, and intellectual, he's far more intriguing than the immature jocks Megan usually goes for. And as she decodes the hidden messages he leaves in the margins of her assignments and in their emails, she realizes this might be more than a schoolgirl crush--especially after...