An urgent Penguin Special investigating the 2014 mass-kidnapping of 276 schoolgirls by the world's deadliest terroristsOn 14th April 2014, 276 girls disappeared from a secondary school in northern Nigeria, kidnapped by the world's deadliest terror group.A tiny number have escaped back to their families but many remain missing. Reporting from inside the traumatised and blockaded community of Chibok, Helon Habila tracks down the survivors and the bereaved.Two years after the attack, he bears witness to their stories and to their grief. And moving from the personal to the political, he presents a comprehensive indictment of Boko Haram, tracing the circumstances of their ascent and the terrible fallout of their ongoing presence in Nigeria.