"1984 isn't just a novel; it's a key to understanding the modern world. George Orwell's final work is a treasure chest of ideas and memes--Big Brother, the Thought Police, Doublethink, Newspeak, 2+2=5--that gain potency with every year. Particularly in 2016, when the election of Donald Trump made it a bestseller ("Ministry of Alternative Facts," anyone?). Its influence has morphed endlessly into novels (The Handmaid's Tale), films (Brazil), television...

Told in the same fanciful, irreverent style as the Hitchhiker trilogy, with scraps of scripts, letters and comments from Adams, Don't Panic is the perfect companion to one of the most successful series in publishing history.