It''s a second part of Discworld series, sequel of adentures of Rincewind, Twoflower and the Luggage. This time Rincewind
is about to face a hard quest: he has to save whole Disc from the incoming burning comet. To prevent the annihilation someone has to, in due time, read eight incantations written in Octavo, the magic spellbook in which are all spells used by the Creator to make the Discworld. The trouble is, one of the spells was stuck inside Rincewind''s head, where it has landed when he has sneaked inside the room where Octavo was held, and took almost whole of his spell understanding ability, making him the biggest failure between Discworld mages. Twoflower and Rincewind, in their adventures, meet a Disc superhero - Cohen the Barbarian
, and together with him, they''re saving the world from the incoming destruction. The story ends with the Twoflower''s home-coming, with the prior giving the Luggage to Rincewind. The book, just as the first series part is very good, so it''s also worth to take a closer look on it.