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 Short Sun which point the narrative connects with the opening of "On Blue's Waters". For much of the first-person account, the narrator is imprisoned on Blue in a town called Dorp on trumped-up charges, and must use his various powers to foment a revolution against the unjust judges who rule the town. In the course of this effort, he again visits the Red Sun Whorl, where he meets a young Severian and inspires him to write a book. Once free, he returns to Lizard and New Viron, where the final riddle of his identity is solved, and helps defend against a massive