Sure. 'L'Étranger' by Albert Camus is a well - known B2 level French novel. The language is not overly difficult and the themes like alienation and the absurdity of life are interesting to study. 'Les Misérables' by Victor Hugo is also a good choice. It's long, but at B2 level, you can start to understand its rich vocabulary and complex plot. And then there's 'La Peste' by Albert Camus as well. It presents a good opportunity to practice reading comprehension and learn more advanced French expressions.
Well, 'Le Rouge et le Noir' by Stendhal is a classic French novel that can be suitable for B2 level. The descriptions of society and the characters' psychology are fascinating. A more contemporary option could be 'Au Bonheur des Dames' by Émile Zola. It uses language that is within the reach of B2 learners and gives an insight into the commercial world at that time. Additionally, 'Phèdre' by Jean Racine, which is a play but still can be read as a text, has language and themes appropriate for B2 level students to study.