Haven't read them, but they are on my to-do-list: "Turing's Cathedral" https://www.theguardian.com/books/2012/mar/25/turings-cathed... "The Innovators" https://en.wikipedia.org/wiki/The_Innovators_(book)
+1 for Turing's Cathedral. As mentioned, it's a lot about von Neumann. Slightly dense writing style but does a great job of explaining some of the key intellectual breakthroughs behind development of the computer. It's most about the 1940s-50s but it sets the historical context well (both contemporary and going back to Gottfried Leibnitz).