"Gulliver's Travels" is one of those books that is instantly recognisable by name. Unfortunately, of those relatively few people that have read it, many are only aware of the first section of the book (the visit to Lilliput), and even then they miss the bitingly accurate social commentary that is woven into the tale.
Swift was making some extremely harsh comments about the society in which he lived; and I would suggest that much of his satirical writing could be seen to be as accurate today as it was at the time of Queen Anne. Certainly I suspect that he would recognise a similar corruption in modern politics, the law, medicine and social behaviour that he knew and despised some 3 centuries ago.
The book is fairly easy to read; for best understanding, it would be worth doing so in short bursts and probably by re-reading sections. Some of the satire is easy to miss, such as the concept of the "low" and "high" heel parties, and the man who wears a pair of shoes that have one high and one low heel; he finds it difficult to walk the line between the two political views. In other cases, it is a belligerent statement of contempt, such as the behaviour of the "Yahoos" in the land of the "Houyhnhmm" (pronounced Winnim") and the comparison to human society.
The story could be read as a childrens tale of fantastical adventures and nothing more; but re-reading it later in life can reveal an amusing, albeit harsh reflection of human foibles.