Through the Gate in the Sea

"Deepwater salvager Mirian Raas and her bold crew may have bought their nation's freedom with a hoard of lost lizardfolk treasure, but their troubles are only just beginning ... When Mirian's new lizardfolk companions, long believed to be the last of their tribe, discover hints that their people may yet survive on a magical island, the crew of the Daughter of the Mist is only too happy to help them venture into uncharted waters. Yet the perilous sea isn't the only danger, as the devil-worshiping empire of Cheliax hasn't forgotten its defeat at Mirian's hands, and far in the east, an ancient, undead child-king has set his sights on the magical artifact that's kept the lost lizardfolk city safe all these centuries" -- Amazon.com.