Seems like we're going on a more non-fiction kick for this theme, so it's unlikely I'll get anywhere with this nomination. But I did say I would nominate it a while ago - so here it goes.
I nominate
Twenty Thousand Leagues Under the Sea by Jules Verne. I'm set to read that this year anyway and I think it does fit the theme (if you look at it from a fiction point of view).
MR Read library has this and it's public domain so I won't bother listing a bunch of commercial or library references:
MOBI,
EPUB
I've gone with HarryT versions there.