Sun Tzu proved on the battlefield that his theories were effective (for example, at the Battle of Boju), that he had a successful military career, and that he wrote "The Art of War" based on his tested expertise. However, the "Zuozhuan", a historical text written centuries earlier than the "Shiji", provides a much more detailed account of the Battle of Boju, but does not mention Sun Tzu at all. Beginning around the 12th century, some scholars began to doubt the historical existence of Sun Tzu, primarily on the grounds that he is not mentioned in the historical classic "Zuo zhuan", which mentions
The Book of the New Sun Severian also notes that the waiter very much resembles himself and it is implied that the waiter is Severian's father. The book ends with Severian exploring the citadel and retracing Triskele's steps through an underground building. Seeing the dog's footsteps and his own he follows the latter, returning to the Atrium of Time. Unlike the four earlier parts of the Book of the New Sun, Urth of the New Sun mostly takes place outside Urth. The book is yet again a continuation of Severian's narration of the aftermath of his ascent to the throne and subsequent journey "between the suns"