If you want an informed analysis of where Bin Laden and his supporters come from, and of what fuels their determination, this is the book to read. There are excellent accounts of the rise of an intolerant, Sunni fundamentalist, current within the Middle East in recent decades: two of the figures he analyses, and who were inspirational for Bin Laden, are Sayyid Qutb, an Egyptian writer who promoted the idea of a militant, uncompromising, Islamic party committed to fighting the west and its followers in the Middle East, and Abdullah Yousuf al-'Azam, a Palestinian who in the 1970s and 1980s toured the Muslim world mobilising pan-Islamic support for the jihad in Afghanistan. It was upon this background of religious militancy in the Arab world that Bin Laden then built his following in Afghanistan. There he turned a collection of volunteers from dozens of countries, but not it seems any Afghans, into the force that became al Qaeda.