Ciphers, codes, secret societies, ancient cults, clandestine sects, religious artefacts and a labyrinthine plot are Dan Brown's currency in his new thriller. Robert Langdon, a world-renowned professor of symbology, is in Paris to give a lecture when he becomes embroiled in an arcane murder - with all the evidence pointing to him as the culprit. But this 'evidence' turns out to be a coded plea to cryptologist Sophie Neveu, who plucks Langdon out of the clutches of the gendarmes and, with his help, sets out to solve a puzzle which leads them inexorably back to the works of Da Vinci. Anyone who's a fan of the likes of Araurcaria, et al, will be drawn into this well written, artfully tangled web of mystery and intrigue.