The team of code-crackers face a new code that has never been solved. Brodie, Hunter and Tusia are back at Station X, the secret code-cracking station at Bletchley Park. And they are still wrestling with the great unanswered question: what secret lies behind the ancient, coded Voynich Manuscript?

Their first adventure left them with a musical box that plays a tune by the composer, Elgar. Elgar loved codes. At once they are off on a new search which takes them to the stories behind Elgar’s famous music and a coded letter he wrote to a young friend, Dorabella.

‘The 'Dorabella Cipher’ has never, ever been solved. Now our team of code-breakers are on a twisting trail via medieval book burnings in Florence, a mysterious boy known as the Orphan of the Flames, and a one-time famous prisoner in London’s Newgate Prison who wrote about King Arthur. Where is it all leading And will they survive, when hot on their trail is a secret organisation that has always thwarted the search for Truth and is prepared to kill to stop them …