This is the second book in the Max and Joey fantasy mystery series. It is geared for children ages seven to eleven. Eleven-year-old Joey and his invisible talking dog Max are aboard a Canine Cruise Ship. When passenger Eula Belle Quattlebaum has her ruby necklace stolen, her granddaughter, Mitzi, joins Max and Joey to search for the missing jewelry. Is there more than one thief? Are they all human? The outcome will surprise you