The students of Chibok were lucky; an education for poor Nigerian girls was vanishingly rare. Then Islamists kidnapped more than 250 of them en masse. Sesay, a broadcast reporter who was born in Sierra Leone, managed to interview some of the survivors (many are still missing), but the footage never aired on CNN, as the 2016 election was under way and the world had moved on. We’re lucky that her detailed reporting has made it into a book — an alternately harrowing and inspiring reminder of the power of education for both its beneficiaries and its savage enemies.