Peak of Martial Arts

Xuan Luo has no recollection of his past. The only thing that can identify him is the jade around his neck. But ever since he had opened the mysterious book from the forest, his strength has multiplied and a current has been running through his body. Strangely enough, the current running through his body resembles the faint current from his jade. Who is he? What is the connection between his jade and the book?