If you want a programmer's eye view of the Apollo hardware / software, I recommend Sunburst and Luminary: an Apollo Memoir by Don Eyles. He wrote some of the

If you want a programmer's eye view of the Apollo hardware / software, I recommend Sunburst and Luminary: an Apollo Memoir by Don Eyles. He wrote some of the programmes that landed the Lunar Module and gives a great perspective on how they worked and integrated with the other programmes (like the radar manager) also running on the LM computer and competing for the tiny computational resources available. [Edit] Including how on one mission he developed a software hack that an astronaut had to type in, correctly, or else, in the few minutes between the LM emerging from the lunar far side and reaching the point where a landing burn was initiated.