How can you not like a book where the main character urinates into a castle and on a princess to save her from a fire? 
 In this book Lemuel Gulliver enbarks on many journeys full of adventure, danger and mystery. Gulliver continually sets off on voyages to new worlds and each time ends up in strange lands, each different from the last. He spends extended time in these lands, learns their language, politics, culture and their way of life. 
 In each place he goes he finds both friends and enemies, good and bad and all of this affects how he views his people back home in England. He starts off a cheery optimist and by the end of the book, can't stand humans at all. It's interesting to see how this character develops and finds a way to survive with minimal damage throughout the years. 
 It is my understanding that Gulliver's Travels is meant to be a parody on human nature and tales from travellers and I think Swift does this well. He combines these themes together to teach us about society, government and religion through a bigger picture.