Chief Superintendent Peter McGarr’s traveled from Dublin to some strange postings in his 14 earlier cases (The Death of an Irish Tinker, 1997, etc.), but no summons has been stranger than his long-lost friend Tim Tallon’s peremptory demand—namely, that he come to Leixleap (“Salmon Jump”) to seek out the connection between a rash of poaching that’s stymied the region’s Eel Police and the two naked corpses, a man and woman of strikingly different generations, found together in bed.