In this smart send-up of our info-overload age, Gary Shteyngart (The Russian Debutante's Handbook) imagines a not-too-distant-future America on the edge of collapse, a postliterate culture where books are dusty relics and communication happens through all-knowing personal electronic devices that display your income, blood pressure, and ''f---ability score.'' The love-triangle plot unfolds through diary entries and e-mails, a gimmick that gets old pretty quickly. But Super Sad True Love Story is funny, on-target, and ultimately sad as it captures the absurdity and anxiety of navigating an increasingly out-of-control world. B+

