Used book – 7 Bullets for Oxford, Volume 2: The Pearl, Quintanilha, Zentner

Now a widower, Detective Oxford can no longer bear to live in the apartment he shared with his wife for forty years. His brother-in-law suggests he move into an apartment above his store. It's a slightly dilapidated warehouse, but once cleared, furnished, and repainted... Everyone in New York dreams of living in a loft! Despite his son's strong reluctance, Oxford accepts the offer. Everything would be fine if, shortly before his move, Oxford didn't notice the disappearance of his precious revolver! Where has the weapon that saved his life more than a thousand times gone, the one he promised his late wife he would retire as soon as the seven bullets remaining in the magazine were used up? He urgently needs to recover it before someone wastes one of those bullets he's striving to save. The irreducible septuagenarian will embark on a complicated investigation that will involve him in the story of a lonely girl who seems to be hiding painful secrets...