QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994)
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QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994) by 
Ciro Santilli 34 Updated 2024-11-19 Created 1970-01-01
Ciro Santilli 34 Updated 2024-11-19 Created 1970-01-01Available for free online rent on the Internet Archive: archive.org/details/qedmenwhomadeitd0000schw
This book has formulas on it, which is quite cool!! And the formulas are basically not understandable unless you know the subject pretty well already in advance. It is however possible to skip over them and get back to the little personal stories.