I found the book Eniac: The Triumphs and Tragedies of the World's First Computer by Scott McCartney a pretty good read:
I also recommend the review by Jean Bartik (i.e. Betty “Jean” Jennings Bartik, 1924-2011) about the book: https://www.amazon.com/gp/customer-reviews/R3K2DSB6UE1X7H/re...
You'll even find some code samples from 1948 on the website.
https://www.hachettebookgroup.com/titles/kathy-kleiman/provi...