‘Every day’, writes the foreign correspondent Wendell Steavenson in this account of the 2011 Egyptian revolution, ‘see-sawed between joy and death.’ She covered the 18-day cataclysm and stayed on in Cairo for another 18 months to report its aftermath, filing for the New Yorker among other outlets. The title refers of course to Tahrir Square, the heart of the conflict, a place ‘shaped like a giant teardrop with a traffic circle in the centre’.