The Bridge of Birds by Barry Hughart
This novel of an "Ancient China That Never Was" follows the quest of Number 10 Ox, a chinese peasant, and Master Li, an ancient scholar and sage, as they search for the Great Root of Power to save the children of Ku Fu Village from a powerful and intelligent plague. The two serve as a sort of Chinese Holmes and Watson dropped into the middle of an Indiana Jones movie and the quest that follows is one of action, adventure, comedy and tragedy that cuts through Chinese Myth, History, Culture and Geography like a hot knife through butter, and at a breakneck pace that never lets up. There are narrow escapes, bloody battles, ancient ruins, shape shifting demons, ghosts, gods and mad alchemists. It stirs emotions, lifts spirits and draws more than a few laughs before the end.