Author Vicente Raga released this as a larger-than-usual installment to accommodate the depth of the "final" resolution for that arc.

A group of Jewish children accidentally stumble upon a mysterious secret society operating within the city's Jewish quarter.

is the eighth installment of the bestselling historical mystery series Las Doce Puertas , written by Vicente Raga (often mistakenly referred to as Vicente Rivas). Published as a special "double volume," this book serves as a pivotal conclusion to the initial major story arc of the saga. Series Overview: Las Doce Puertas