A journalist who has followed the rise of QAnon explains what it is, how it has gained a mainstream following among Republican lawmakers and ordinary citizens, the threat it poses to democracy, and how we can reach those who have embraced the conspiracy and are disseminating its lies. “Punchy and well-reported. . . . Sommer is the perfect person to tell this story. He traces the rise of lawless message boards like 8chan, he profiles the key players, he chronicles QAnon’s influence on the Jan. 6 attack on the Capitol, he sneaks into QAnon rallies, he analyzes Republican reactions to the blight in their fields, and he breathes deep of the madness, while staying blissfully sane himself.”—Dwight Garner, New York Times