Much detail about the huge operation that did not involve the Turing character directly was left out or reduced. Most in the UK who have read anything about the use of cryptography in the second world war know about the Polish contribution.

http://www.bbc.co.uk/news/magazine-28167071

I've read most of Kahn's history of code breaking (2006 edition) which was originally written before the Bletchly Park project was publically acknowledged and I found out about the US cracking of Japanese codes using machine assistance but not what we would recognise now as an electronic computer. Kahn's book is handy for historical depth - this whole cryptography/cryptanalysis thing has been something of an arms race from the invention of radio onwards.