Author Sinclair McKay hits the theatre and festival circuit to give audiences a fascinating glimpse of the vital wartime work carried out at Britain’s top secret code-breaking centre at Bletchley Park.

Accompanied by previously unseen illustrations, his talk partners the publication of The Lost World Of Bletchley Park - the first official illustrated history of the one-time hush-hush establishment.But its story -  once under-wraps - is now gradually being revealed. Sinclair’s previous book, The Secret Life of Bletchley Park, sold more than a quarter of a million copies.

There have been a number of TV documentaries as well as the popular ITV drama series The Bletchley Circle. Meanwhile Bletchley Park itself has become one of the most popular visitor attraction in the country. McKay is also available for corporate events and conferences as well after-dinner speaking engagements.