Dan Brown leapt to fame and fortune in 2003 with his fourth novel, The Da Vinci Code, which was made into a big-budget Hollywood movie in 2006.

Brown has come in for some criticism, notably from the Catholic Church and some Christian groups: feathers were ruffled by his depiction of the Catholic organisation Opus Die in The Da Vinci Code as a sinister underground organisation full of secrets, riddles and even ruthless assassins, bent on preventing scandalous ancient truths becoming public.

Perhaps the most important point to remember is that no one reads a Dan Brown novel for religious enlightenment, or even for literary finesse: he is a story-teller extraordinaire, with a fantastic talent for keeping you frenetically turning his pages until the book is finished. Fascinated by cryptology (the art of concealing secret messages in symbols), Brown places this subject at the heart of his Robert Langdon novels, the fictional Professor of Symbology from Harvard University. The stories offer compellingly enigmatic examples of covert ingenuity and coded concealment, whilst yielding abundant edge-of-the-seat, heart-pounding thrills along the way. Brown’s novels are lengthy, but his prose style is addictive: he writes in short bursts, a technique that keeps you compulsively glued to the text.

The success of Da Vinci boosted the sales of Brown’s earlier works, including Digital Fortress and the first Robert Langdon novel, Angels and Demons. The third Robert Langdon novel, The Lost Symbol, is reportedly due for release in September 2009; set in Washington DC, it apparently features the byzantine secrecy of the Freemasons.