'Neptune King and the Counterfeiters is the 16th book in the series. K&J are hired to find a counterfeiting ring, but they are not too optimistic about their chance of success. Being a lazy day at work, Neptune decides to take a nap and dreams about the future: of a time when he and Shark's children are teenagers.
'Shark's sons Link and his brother Leo accidentally get involved with counterfeiters, while Neptune's daughter Katrina witnesses a murder during a fox hunt. His son Max and Link help to crack down on drug dealers, dealing at their school, while Shark's daughters Jacqueline and Josephine get involved in a Miss Teen beauty pageant, only for Josephine to be almost killed by someone intent on winning. When Neptune wakes, he realizes that his subconscious mind has given him a clue as to who and where the counterfeiters are and they lead the police straight to the counterfeiter's headquarters, once again proving that they're the best in the business. So good in fact, that they can solve crimes in their sleep!' (Publication summary)