Possible Clues:

• Muslim pilgrimage (Var.)
• Fifth pillar of Islam
• Once-in-a-lifetime pilgrimage
• Muslim's journey
• Uris novel, with "The"
• Leon Uris novel (with "The")
• Muslim pilgrimage to Mecca
• Leon Uris novel, with "The"
• "The __": Uris novel
• Mecca pilgrimage