Not a computing history book per se, but has some chapters about Alan Turing and the work done at Bletchley Park in WWII. Also the best introduction book to Cry

Not a computing history book per se, but has some chapters about Alan Turing and the work done at Bletchley Park in WWII. Also the best introduction book to Cryptography. Simon Singh, The Code Book http://amzn.com/0385495323 http://amzn.com/0385495323