<p><strong>A secret mission to Lisbon.</strong></p><p><strong>A murder at the casino.</strong></p><p><strong>And a killer gambling on escape.</strong></p><p>New Year&#39;s Eve, 1935.</p><p>The clink of champagne flutes mingles with the rattle of the roulette ball. Fina&rsquo;s on a winning streak. But just as she&rsquo;s about to celebrate, someone gasps, chokes, and slides to the floor.&nbsp;</p><p>The Portuguese police treat it as a crime passionel, but Ruby and Fina have other ideas. Could the murder be linked to the high-level jewel-smuggling operation they&rsquo;ve been asked to investigate? Working undercover, they scope out the other guests: a handsome airman, an icy princess, a genial mathematician, a suave croupier, and a Brazilian diva with flashy frocks and a personality to match. They all have something to hide &ndash; but the truth turns out to be far stranger than Fina could ever have dreamed.</p><p>Join Ruby, Fina, Pixley, and Gayatri as they battle with profiteers, saboteurs, assassins, and a ghostly apparition on their twistiest and most captivating adventure yet!</p>