All the King's Men has such beautiful language. I hope you like it. Sophie's World is also good :) War and Peace is very good, but you do really have to commit to it. Long hours with the book. I read it before I got addicted to Warlight - I don't know if I'd get through it now :P
The King's Men seems to be a very interesting book, Beren do you have any other books to advise?
I also used to read many Sci-fi related books such as Bernard Werber's books, quite easy to read and very original (like "Les fourmis"), and I just started the Mars trilogy saga of Stanley Robinson. I also read the entire books of GRR Martin, just because I am a huge fan of ASOIAF universe and I can't wait for the next book being released soon.
Another current French author with a very pleasant writing is Marie Darrieussecq in my opinion, one of the most awarded author recently, I particularly liked the book "Le Pays" (translation of the Nation/country) which is centered around a fictional small nation that achieved independence mainly inspired from the Basque Nation, identity and current struggles (and yeah I'm Basque so indeed I consider it as one of the best book ahah).
I've also read Sophie's World (never finished it) when i was a teen, and it is mostly just that: a pseudo deep/intellectual phylosophy book for teens who wants to give meaning to their prepubescent lives
xD Well more than that, as I told you I read this while in high school, and it helped me greatly to achieve good scores in Philosophy classes ;) I could not have some philosophical principles or understanding without Sophie's World, so again it helped me greatly.
Edited 1/13/2016 11:50:21