The book cover has a man with a yin yang tattoo on his shoulder and a dragon tattoo on his arm. His back is facing the front and in the background I believe there is a mountain or valley.
The story is about a boy with these tattoos who is destined to defeat an evil demon who was sealed away in a mountain. He comes into contact with a monkey whose duty is to train the boy to fight the demon.
While this is going on, his mother meets a monk while traveling on the road, and they end up falling in love. However at the end of the book she is kidnapped I believe by a demon of something like that and the monk has to go rescue her.
Please help me to identify the book, this is all I remember about the story but I was hoping that by now the sequel would have come out by now. But I can't remember the title! I read the book about three years ago, but I know it came out years before I read it. I believe it came out in the early 2000's and is a Chinese myth/folk tale type book