Which English, Spanish and French authors have spoken about the crisis of values?

Albert Camus. Jean Paul Sartre.

more of them than I care to count.

C.S. Lewis, “The Screwtape Letters”
T. S. Eliot “The Wasteland”

James Joyce’s “The Portrait of the Artist as a Young Man” would be excellent for this topic.

Older ones:

Les Miserables
Count of Monte Cristo

Rousseau

Moliere’s play “Tartuffe” is about a religious hypocrite.

Walden Pond by Thoreau

If you’re interested, Mark Twain was also fascinating and brilliant.

Before Twain, there weren’t American fiction writers who said, ‘Here’s the deal: I will create a scene and show you how this was wrong,’” Chadwick said.

“His message is, ‘Let’s all confront what we see.’ That’s what literature is supposed to be, to help students learn critical thinking,” Chadwick said.

http://archive.boston.com/news/education/k_12/articles/2010/11/07/mark_twain_still_relevant_100_years_postmortem/