Amid Boko Haram's persistence, an increasingly specialized literature emerges - Hilary Matfess, Women and the War on Boko Haram: wives, weapons, witnesses. London: Zed Books (pb £14.99 – 978 1 78699 145 4). 2017, 270 pp. - Scott MacEachern, Searching for Boko Haram: a history of violence in Central Africa. Oxford: Oxford University Press (hb £21.99 – 978 0 19 049252 6). 2018, 248 pp. - Abdulbasit Kassim and Michael Nwankpa (eds), The Boko Haram Reader: from Nigerian preachers to the Islamic State. London: Hurst (pb £25 – 978 1 84904 884 2). 2018, 384 pp.