It hasn’t even reached bookstores yet, but experts are already predicting that Dan Brown’s forthcoming book, The Lost Symbol, will be the biggest-selling book of the year when it hits shelves this September. The new novel is a sequel to The Da Vinci Code and once again features Harvard symbologist Robert Langdon.

The new title was deliberately chosen to be “as opaque as possible”, according to a source close to the project. “Dan Brown is so phenomenally successful that anything he says in relation to his books can spawn a whole publishing industry in itself.” Brown had previously hinted that his next novel would be set in America and concern freemasonry, just as The Da Vinci Code delved into the religious organisation Opus Dei, and its predecessor, Angels & Demons, tackled a secret society called the Illuminati. His books have antagonised Christian groups and upset sensitive lovers of fine English prose but their protests have been drowned out by record-breaking sales.

Analysts say reader anticipation for the book will likely spark the sort of hysteria that surrounded the releases of the Harry Potter books. Any Dan Brown fans who can’t wait for his latest release?