> Le petit prince I wouldn't have wanted on the list, I know it's popular and french

It is very popular and a huge influence. I am not surprised (but then I am French and always found St-Exupéry fascinating).

> Ulysses, as mentioned below, surprised me as I thought it's only popular in some countries

Me too, to be honest. Quite a few English-speaking authors are maybe unexpectedly quite popular (Hemingway and Fitzgerald are there, and I think it is deserved; Dickens and Mark Twain should have been), but I would not think about Ulysses.

> The Hound of the Baskervilles is important and well known and everything, but does it really held up when you read it today

Crime is an important genre and Sherlock Holmes is quite popular (even though I would personally put something by Maurice Leblanc or Agatha Christie instead).

> Stephenson's Snow Crash is missing, maybe replaceable with Neuromancer to have something of that genre.

Sci-fi is underrepresented. I would put Neuromancer definitely, and at least something by Jules Verne. I cannot believe 20,000 Leagues Under the Seas did not make the cut.

Thanks for the suggestions, I’ll have a closer look at the books you mention I don’t already know :)

40 is Mann’s Magic Mountain.

https://en.wikipedia.org/wiki/Le_Monde%27s_100_Books_of_the_...