Nicholas P. Oakley 
The Watcher [PDF ebook] 

Set in the far future, on the tribal world of Gaia, this debut science fiction novel tells the story of Tian, a young hunter struggling with loss of her childhood lover who disappeared under mysterious circumstances. When Tian»s tribe is threatened by violent slavers, she received help from a Watcher—a monstrous, mythical creature who is actually a genetically enhanced anthropologist from an advanced civilization. Through the juxtaposition of the precivilization tribes and the technologically advanced society of the Watchers, the novel explores themes of the role of ideology and tradition in daily life.