Firstly, it should be noted that The Lost Symbol has incorporated all the elements that so transfixed readers in The Da Vinci Code: a complex, mystifying plot (with the reader set quite as many challenges as the protagonist); breathless, helter-skelter pace (James Patterson's patented technique of keeping readers hooked by ending chapters with a tantalisingly unresolved situation is very much part of Dan Brown’s armoury). And, of course, the winning central character, resourceful symbologist Robert Langdon, is back, risking his life to crack a dangerous mystery involving the Freemasons (replacing the controversial trappings of the Catholic Church and homicidal monks of the last book). And while Dan Brown will never win any prizes for literary elegance, his prose is always succinctly at the service of delivering a thoroughly involving thriller narrative in vividly evoked locales (here, Washington DC, colourfully conjured).