Fire and the Skin — Lee Morgan

For three years the desire that once led Christopher to the door of the occult has simmered below the surface of his life, brooding in the moody atmosphere of the Cornish moors, where the coven has settled. For three years Eugene has remained silent, leaving a hole in their lives even Sophia has felt keenly. Christopher knows he is coming of age as a sorcerer, close to outgrowing Seth's tutelage and poised on the edge of independence. New magical currents are stirring under their feet, inside the hills, and within the very walls... The return of Vincent's witchcraft teacher shakes up the order of their established magical fraternity bringing them a greater understanding of the past and its ever-present echoes in the present. Christopher becomes obsessed with following his visions of Eugene, leading him up to the door of the shocking truth behind his fetch mate's absence. In this third book of the series Christopher's long flirtation with the realm of Faerie results in a shattering breakthrough, where arcane intelligences of the ancient land suddenly break through into their lives threatening all they hold dear.