a category of writing derived from the French phrase meaning "beautiful" or "fine" writing; includes all literary works—especially fiction, poetry, drama, or essays—valued for their aesthetic qualities and originality of style and tone
The term 'fine writing', or belles lettres, is in this sense ambiguous: it denotes a sort of writing which is generally highly regarded, while not necessarily committing you to the opinion that a particular specimen of it is 'good'.