Policeman novelist Matti Yrjänä Joensuu is a Finn with a vision. In this book, he develops a peculiar mish-mash of new age religion, serial killings, deeply troubled adults and their disturbed relationships with appallingly cold and twisted parents, bullied children and their close friendships, mind control, and beneath it all, such aching sadness that it is not surprising Finland has one of the highest suicide rates in the world. A couple of fundamentalist preachers are accosting passersby at various Metro stops in Helsinki, and there appears to be a correlation between them and people falling onto the tracks. Were they pushed? Are they suicidal? The CCTVs show nothing suspicious. The investigating policeman is that rare bird in detective fiction - a man truly content in his marriage and with his little girls. Separate strands of the tale deal with a shaman who invokes an earth goddess and bleeds birds to death for his sacrifices, and a boy who strikes up a friendship with a girl who saves him from bullies. The boy's mother is a virulently manipulative shrew, and his father is - like Joensuu - a man isolated from his colleagues because of his side career as a successful novelist. It's obvious from the get-go who the killer is, but the goodness in the book is in the chase and in the details of a hidden Helsinki, and Joensuu's fervent belief that the police, with a ringside view on society, is the front line in sensing evil in all its forms.