A Sacred Work

It is a book that I offered a passionate subject and found it absolutely rewarding and comprehensive book.
It is a work to be recommended to anyone who wants to learn more about the code breakers in full World War II.
The exploited period extends from 1938/1939 (the school of codes) to 1945 end of the war.
The last four chapters span a period from 1945 to 1970 approximately.
"The code breakers" or the adventure of men who influence the course of history, a book both the novel and historical work, a sacred work.