What has the author Stanislas de Saint-Loup written?

There is no author named "Stanislas de Saint-Loup." This name appears in the novel *Remembrance of Things Past* by Marcel Proust, as the character who inspires the narrator's love for Albertine.

The character's full name is actually Robert de Saint-Loup, but he is often referred to as "Stanislas" throughout the novel.

It seems you might be confusing a fictional character with a real-life author.