In Reinventing Jihad, Kenneth A. Goudie provides a detailed examination of the development of jihad ideology from the Conquest of Jerusalem to the end of the Ayyubids (c. 492/1099-647/1249). By analysing the writings of three scholars - Abu al Hasan al Sulami (d. 500/1106), Ibn ?Asakir (d. 571/1176), and ?Izz al-Din al-Sulami (d. 660/1262) - Reinventing Jihad demonstrates that the discourse on jihad was much broader than previously thought, and that authors interwove a range of different understandings of jihad in their attempts to encourage jihad against the Franks. More importantly, Reinventing Jihad demonstrates that whilst the practice of jihad did not begin in earnest until the middle of the twelfth century, the same cannot be said about jihad ideology: interest in jihad ideology was reinvigorated almost from the moment of the arrival of the Franks.