To Rise Again at Decent Hour - Joshua Ferris, Penguin

Introducing Paul O'Rourke: New Yorker, dentist and reluctant non-believer. Modern life disappoints him, and love never solves any of his problems. Then someone steals his identity and starts impersonating Paul online. A cruel invasion of privacy, the real horror is yet to come: this virtual 'Paul', preaching an obscure, ancient religion, might just be a better, happier person than the real deal. Anxious to find out who is responsible for this disturbing turn of events, Paul embarks on a quest which will see him confront the meaning of life, the inevitability of death and the importance of good oral hygiene.