'The overall effect is like a brilliantly well-informed 200-year history of philosophy, science, music and mysticism, touched with an edge of Da Vinci Code hocus pocus, in the sense of an alternative "sub rosa" world history never quite revealed. To say so, though, is to miss the sheer fun and narrative energy of Crumey's writing, the skill and insight with which he conjures up each of his narrators from the repellent to the poignant, and the huge...