The Rosie Project by Graeme Simsion
Love isn't an exact science - but no one told Don Tillman. A handsome thirty-nine year old geneticist, Don's never had second date. So he devises The Wife Project, a scientific test to find out the perfect partner. Enter Rosie - 'the world's most incompatible woman' - throwing Don's safe, ordered life into chaos. Just what is this unsettling, alien emotion he's feeling.