The Count of Monte Cristo , hands down. Published 1844 by Alexandre Dumas, one of the greatest writers to have ever lived. I’m an avid reader and I always laughed at the idea of having a “favorite” book.. until I found mine. I loved the book so much, I resolved to learn French (et je l’ai fait!) just so I could someday read it in the original French.
This is going to sound weird, but... I remember your comment from four years ago (!) [0] and it really stuck with me. However, I could never find the thread, so when I saw this thread, I simply had to check if you wrote a comment again; and here we are! I recently began reading it and is really enjoying it. Thanks for the recommendation! [0]: https://news.ycombinator.com/item?id=12245036
Enjoy!
(Also, thanks for the link to the earlier comment. I had forgotten about the unabridged bit!)