The 34th rule
(Book - Mass Market Paperback)

For once, business is going well for Quark, not that anyone on Deep Space Nine truly appreciates his genius for finding profit in the most unlikely of circumstances. Quark is even looking forward to making the deal of a lifetime -- when he suddenly finds himself stuck right in the middle of a major dispute between Bajor and the Ferengi Alliance. With diplomatic relations between the two cultures rapidly breaking down, Quark loses his bar first, then his freedom. But even penniless, he still has his cunning and his lobes, and those alone may be all he needs to come out on top -- and prevent an interstellar war!