Define the research question. "Pilgrimage and practice in medieval Islam"
You might choose to address any number of issues raised by the author or select passages in particular from the work that you believe highlights the author's doctrinal stance (i.e, as a theologian, a mystic or a philosopher)
Generally, pilgrimage by definition is a journey to a sacred place by a religious sect. Islam as a religion adopted the practice of pilgrimage during the mediaeval ages with Hajj being the most notable one. The history of Hajj is however not well documented, though Islamic writers aver that it originated during the times of Abraham by way of establishment of the Islamic Hajj by