Hyacinth and the Secrets BeneathBy: Jacob Sager Weinstein Series: Hyacinth The hilarious first book in a middle grade fantasy trilogy about the magical rivers that run through the sewers of London and shape history in ways you'd never learn in school. Magic is real. History is a big, fat lie. Hyacinth Haywards mother has just been kidnapped by lumpy gray monsters in post office uniforms. But why? Well, before Hyacinth moved from Illinois to London, she read up on the citys history.