by Ben Aaronovitch
Peter Grant is a young police constable in London. He’d love a permanent assignment to the Murder Squad, but he’s been marked down for a permanent posting in bureaucracy. But young constable Grant has a talent his superiors haven’t yet discovered: at a crime scene, he sees clues that his colleagues miss. In Grant’s case, his clue is a witness to a brutal Covent Garden mugging, a witness who is helpful and informative but who is also, inconveniently, a ghost.