In the second book of the Scotus O'Linn trilogy, the most maligned politician in Ireland is back battling the dark forces that inhabit the Emerald Isle's Otherworld: the Daoine Sidhe. But this time the vengeful fairy race has in their possession the deadliest weapon of all: an ancient Irish manuscript that when carried thrice around their army in battle guarantees victory. With danger lurking around every corner in the guise of vengeful fairy assassins and distraction in the shape of the beautiful Brid de Burca and Ashling O'Connor, the Minister of Supernatural Affairs - stumbling from one political crisis to another – must somehow save his country yet again. But to do so, Scotus must find a way to counter the ancient powers of the stolen Battle Book and face the dark demon – the King of the Sidhe – who has destroyed everyone close to Scotus O'Linn and who seeks ultimate victory against the Gaels of Ireland.