Wish You Were Here by Jodi Picoult

Diana O’Toole’s life is going perfectly to plan. At twenty-nine, she’s up for promotion to her dream job as an art specialist at Sotheby’s and she’s about to fly to the Galápagos where she’s convinced her surgeon boyfriend, Finn, is going to propose.

But then the virus hits New York City and Finn breaks the news: the hospital needs him, he has to stay. But you should still go, he insists. And reluctantly, she agrees. Once she’s in the Galápagos, the world shuts down around her, leaving Diana stranded – albeit in paradise. Completely isolated, with only intermittent news from the outside world, Diana finds herself examining everything that has brought her to this point and wondering if there’s a better way to live.

But not everything is as it seems…