Lemual Gulliver is a surgeon from 18th Century England who decides to become a ship's surgeon and travel the world. Unfortunately, on all four of his voayges he is either shipwrecked or abadoned on various islands where he sees amazing sights and meets extremely unusual societies.
Some of the things he encounters are the Lilliputians, a race of men no more than six inches high, giants of about seventy-two feet high, a flying city, people so lost in thought that they need servants to keep them from walking into things or to speak, ghosts, and a society of horses. He makes obersvations about everything he sees and compares it to his native England.
While most of the book is interesting and its comparisons to England are enjoyable, having brought many I think it suffers in the final quarter when it discusses how great the Houyhnhnms are and how horrible humans are. Recommended if you enjoy political satire.