content: I was really hoping for a more detailed time line of the events leading upto the ENIGMA and what eventually lead to the first commercial computers during the late 50s and mid 60s. The author spent a great deal of time detailing the mathematical advances and controversies that spurred the technological advances we see today. Overall the book was mildly interesting, but probably not for the average reader. On the other end of the spectrum it was too much of a primer for anyone with some historical knowledge of mathematics and its part in developing computers.