Yes, indeed it is true!
In 1610, the infamous "Quema de brujas en Logroño" (Burning of the Witches in Logroño) witch trials took place, and a local printer, Juan de Mongastón, published a pamphlet chronicling the events. This document detailed the trial and condemnation of 53 people accused of witchcraft, along with five skeletons and five effigies, creating a vivid picture of witchcraft and its supposed dangers.