Rosen does a swell job evoking classic 1950s film noir vibes while filling the story with a diverse queer cast and a complicated gay ex-cop P.I. reckoning with the implications of his past career. The themes -- book banning, government censorship, the utter importance of queer people seeing themselves reflected in books -- are beautifully evoked. Highly recommended as a puzzling mystery and a richly imagined 1950s San Francisco historical fiction.