Warning, a fourth chapter in Havel’s Ferdinand Vaněk cycle, receives a staged reading at 92NY’s Unterberg Poetry Center, 1395 Lexington Avenue, at 7:30 p.m. tonight, followed by conversation. F. Murray Abraham and Adam Gopnik lead the cast. The attraction is the form as much as the rarity: Vaněk, Havel’s dissident alter ego, turns bureaucratic language into dark comedy about coercion and accommodation. The Havel Center describes it as the world premiere; 92NY’s season page confirms the date and participants. The event page was visible this morning, but selectable inventory was not verified, so this is a same-day lead rather than a ticket-availability claim.