At First Sight by Hannah Sunderland

Two strangers. Two chance meetings. One extraordinary love story… Nell and Charlie feel a spark when they meet by chance in a cafe. But they don’t trade numbers, or surnames, so there’s no way they’ll meet again. But the next day, Nell’s phone rings at work. Somehow, impossibly, Charlie is on the other end. And he needs her help. Nell is about to save a life, fall in love … and risk everything for a perfect stranger.