This focus on accuracy was a challenge for Staten, as he believes his audience is highly intelligent, willing, and able to report flaws;[1] fellow Bungie employees cross-referenced his drafts with the "Halo Story Bible" to ensure canonical agreement.[2] One example of fans taking Staten to task over the novel occurred soon after the novel's cover was revealed in July 2007.[9] The cover depicts the protagonist, Sergeant Avery Johnson holding a weapon known as the Battle Rifle.