Gulliver's Travels, Jonathan Swift, Baronet Books.
I grew up reading the Great Illustrated Classics Collection. These timeless tales are sort of re-written without the 'outdated' language the authors used that young readers would not understand. There are still nautical terms and pirate jargon, but the drawings on each page help the young reader understand the stories. I recommend the tales of Mr Lemuel Gulliver because there are four wonderous voyages all in one adventure!