Oni-Devils (Fox Sorcery, #2)

Folklorist Andre Minamoto has returned to Japan to gather data for his doctoral thesis. Most of what he comes across has already been studied. He needs a breakthrough. He needs something new and wonderful. When he discovers a man who claims to be the legendary yin-yang wizard, Abe no Seimei, he is skeptical. After all, a man born in the year 920 has to have been dead and turned to dust by now. Little does he know that he is about to enter an uncharted world where what we think is fantasy is...