Bestseller
A bestseller was any book that sold a large number of copies.
In 2369, Julian Bashir opined that if Vash wrote a book about the Gamma Quadrant, it would be a bestseller on Deep Space 9. (DS9: "Q-Less")
In 2372, during Quark's dream, Grand Nagus Gint assured him that the Rules of Acquisition were important, hence their bestseller status. (DS9: "Body Parts")