Having read a few books about Bletchley Park now this is the one that is the most intimate and personal. It does cover the science and technological side of the code breaking, but this is not the primary focus of the book. It is a series of anecdotes and memories of people who worked there, with the known loose ends tied together.I liked narrative of the book, the author has written it with a light touch, leaving the people who worked there to tell their story and hear their voices.a good book and a good addition to the magnificent story of Bletchley.