French authors for intermediate students

I am at an intermediate level in my French reading ability. Most simplified texts and children's books are too easy or boring, but many French authors have a style that is a little difficult for me. (Harry Potter in translation is about my level, but I'd prefer original works in French.) I'd appreciate any recommendations on Francophone authors (including Quebecois) that use a straightforward style (like Pearl Buck for English) that would be not too difficult to read and yet interesting.

Have you tried Marguerite Duras?

have you tried chinga tu madre wey

Try the Petit Nicolas collection by Goscinny (with ilustrations by Sempé)

... and also Daniel Pennac's works