The triumph and near-tragedy of the first Moon landing 9 years ago
If you are interested in more details of the guidance and control system of the Apollo missions, I highly recommend the book Digital Apollo by David A Mindell.
Someone a while back on hackernews recommended the above book and it was absolutely fascinating and it's written remarkably well, very engaging. I am now a professional GNC engineer :) The book also delves into the gradual evolution of fly by wire flight controls starting with the X-15.