Broken Homes is book number four in Ben Aaronovitch’s PC Peter Grant series. This book differs from the previous three in structure; Peter is working on several cases at once, and they’re not all related. In fact, there’s only two that are truly related to the magical parts of London.
PC Peter Grant is called in when the cops find blood they can’t account for at a traffic accident. Their prime suspect is one Robert Weil, one of the apprentices of the original Faceless Man. There’s blood, but where’s the body? A man jumps in front of a train, but the circumstances are odd. Jaget Kumar shows Peter the footage, and they agree there was magical interference. Meanwhile, a stolen book on magic turns up, but hasn’t been reported stolen. It used to belong to Erik Stomberg, a German architect who happened to design one of the most infamous landmarks in London people have been trying to demolish for years. A grandfather injures himself during his granddaughter’s birthday party, while trying to create a werelight. Very few of these cases seem to be related, yet Peter can’t help but feel the Faceless Man has come back into play.