From The Primer, Princess Nell's Activities as Duchess of Turing Summary

While Nell is working at the brothel, she befriends many of the other Chinese girls and starts to bond with them and their culture. At night, she spends her time with her book and works through the enigmas and technical problems. In the Illustrated Primer, Princess Nell slowly but surely solves the mysteries of the castles around Castle Turing. Her programming skills allowed her to control the army of robotic soldiers and replace the Duke as the Duchess of Turing. She soon finds that each of the remaining castles is plagued by a problem caused by a mysterious Black Knight, and that each solution is an application of the programming techniques she learned in solving the problems encountered in the previous castles. In the third...