Matched (Matched #1)

Cassia has always trusted their choices. It’s hardly any price to pay for a long life, the perfect job, the ideal mate. So when her best friend appears on the Matching screen, Cassia knows with complete certainty that he is the one…until she sees another face flash for an instant before the screen fades to black. Now Cassia is faced with impossible choices: between Xander and Ky, between the only life she’s known and a path no one else has ever dared follow—between perfection and passion.

Matched is book number 1 in the Matched series by Ally Condie.