Possible Clues:

• Pilgrimage to Mecca
• Leon Uris novel, with 'The'
• Muslim pilgrimage
• "The ___" (Uris novel)
• Trip to Mecca
• Journey to Mecca
• Uris novel, with 'The'
• Muslim pilgrimage: Var.
• 'The ___' (Uris novel)
• Meccan pilgrimage