Understanding extremism
Names such as Abu-Musad al-Zarqawi, ISIS, al-Qaeda, Osama bin Laden, Abu Bakr al-Baghdadi and al-Nusra have become familiar to anyone keeping abreast of world affairs.
John Brand, West Lothian
BLACK FLAGS:
The Rise of ISIS
By Joby Warrick
Corgi. 480 pages. £8.99
ISBN 978 0 552 172 882