In Interesting Times by Terry Pratchett, the Patrician of Ankh-Morpork receives a letter from the Agatean Empire demanding that a great wizard be sent to them. He relays this message to the Arch-Chancellor of Unseen University. After conferring with the wizard staff of Unseen University, they come to the conclusion that none of them want to undertake the journey, so they decide that they should send the inept wizard Rincewind. They summon Rincewind through magical means, and then subsequently transport him to the Agatean Empire. Once there, Rincewind finds himself being forced to participate in a revolution quite against his will that it turns out was inadvertently started by an old friend of his. Rincewind wants no part in the revolution and seeks only to escape, but Fate has other plans for him.
This was a really fun and hilarious book. I really love the characters Rincewind and Twoflower, and I was delighted that the Luggage made a reappearance in this book. I highly recommend it to fans of Terry Pratchett and the Discworld series, or anyone that enjoys British humor. While it's probably not necessary to read all of the Discworld books that come before Interesting Times prior to reading it, I would recommend at least reading The Colour of Magic and The Light Fantastic first, and perhaps Sourcery and Eric as well.