I read it as a kid, but was very pleased to read the new edition / translation published by the Naval Institute Press:
http://www.usni.org/store/books/fict...gues-under-sea
It's a marked improvement, though tinged somewhat by my having read _The Mysterious Island_ as well as _The League of Extraordinary Gentlemen_ --- so his being described so as to likely have been Polish was a bit off-putting.
Very fitting that the U.S. Navy named the first nuclear submarine USS Nautilus (SSN-571) (and a previous WW-II era SS-168) for it. Wonder what happened to my plastic model of it....