Oddly, I've had Treasure Island on my TBR (to be read) list for about 30 years and somehow have still never read it. I think that's what Nathan Bransford would refer to as a gap book:
"We all have our "gap" books, those books that everyone in the world has read and talks about all the time and look we are really meaning to read them but we're all very busy and there are a lot of books to read and no one could possibly be expected to read them all and why do I have to defend myself aha;sldkjf;aj"I guess I need to get on that.