Red Seas Under Red Skies (HS Kindles)

From Goodreads: Locke and his trusted sidekick, Jean, target the grandest prize of all: the Sinspire, the most exclusive and heavily guarded gambling house in the world. Its nine floors attract the wealthiest clientele—and to rise to the top, one must impress with good credit, amusing behavior… and excruciatingly impeccable play. For there is one cardinal rule, enforced by Requin, the house’s cold-blooded master: it is death to cheat at any game at the Sinspire.  But someone in Tal Verrar has uncovered the duo’s secret. Someone from their past who has every intention of making the impudent criminals pay for their sins. Now it will take every ounce of cunning to save their mercenary souls. And even that may not be enough.