One of the better paced Cussler father/son duo Pitt novels, this book still features the same playbook, in my humble opinion, of father providing the story and/or guidance and son penning the majority if not all of the novel. The dialogue remains very straightforward and simple, if not dull, as the previous 5 Cussler/Cussler Pitt books, but I enjoyed the plot of this novel more than most of the previous 5. Sidenote: Cussler in his heyday wrote 100 times better plots and dialogue than these father/son efforts. Dirk Pitt and his twin children find themselves in the middle of a plot by Cuban nationals to mine the seafloor for minerals/elements that will provide materials necessary for nuclear weapons. The actions of this mining are releasing large amounts of mercury into American waters. Also, the kids are off searching for an ancient Aztec treasure that (of course) ultimately ties in to the problems they face in Cuban waters. I see an improvement in Dirk Cussler's writing efforts with this one, but he still has a long way to go to match what Clive cranked out when he was in his prime. I could recommend this one as a beach book with a favorite beverage as a companion.