For a longer read, I can highly recommend the book "The Man from the Future" by Ananyo Bhattacharya. It's quite an easy read and extensively discusses the life and discoveries by John von Neumann in chronological order.
I had to frequently pause my read to research a discovery in more depth to understand the significance of it and I got a chuckle when he marries his childhood sweetheart because she got no mention prior to that point in the book.
I read this last year and also recommend!
Books from before the age of AI will only become more precious over time. This is great.
He's my favourite mathematician too. Loved The Man from the Future book. Can we get a frontier model named after him perhaps? "Johnny" would be a great codename imo
"Turing's Cathedral" by George Dyson is also great. It's a kind of broad biography of all the great minds that started the computer age.
ctrl+f'd this to make sure, 2 hits of course. Highly recommended, there is a fun anecdote in there that resembles rowhammer but done on magnetic core memory iirc