In the previous episode of The Library, masked pirate-magicians said they would sell Prince Wing a cure for the spell that infested Faithful Margaret's hair with miniature, wicked, fire-breathing golems. (Faithful Margaret's hair keeps catching fire, but she refuses to shave it off. Her hair is the source of all her magic.)
The pirate-magicians lured Prince Wing into a trap so obvious that it seemed impossible it could really be a trap, on the one-hundred-and-fortieth floor of The Free People's World-Tree Library. The pirate-magicians used finger magic to turn Prince Wing into a porcelain teapot, put two Earl Grey tea bags into the teapot, and poured in boiling water, toasted the Eternally Postponed and Overdue Reign of the Forbidden Books, drained their tea in one gulp, belched, hurled their souvenir pirate mugs to the ground, and then shattered the teapot that had been Prince Wing into hundreds of pieces. Then the wicked pirate-magicians swept the pieces of both Prince Wing and collectable mugs carelessly into a wooden cigar box, buried the box in the Angela Carter Memorial Park on the seventeenth floor of the World-Tree Library, and erected a statue of George Washington over it.
(kelly link, from "magic for beginners")