Search for the swan maiden

"Following the heartbreaking conclusion of his second case, Sam has spent his days searching for the swan maiden. Driven by his belief the maiden is still alive, he sets out with Dr. Vance Vantana and Tashi on a forbidden quest to reunite his family. But the journey is long and treacherous and will lead them through the lair of the Mongolian Death Worm--a terrifying creature that has broken the Gryphon's Law and is attacking anyone who dares to cross its path"--Provided by publisher.