- Biographies of the preeminent scientists of the 20th century
- A history of late 19th and early 20th century physics and chemistry. Much more technical than many history books, which is a drawback for some audiences, but probably an attraction for a lot of people here.
- A history of World War I and World War II
- A history of the engineering and operation of the Manhattan Project
Highly, highly recommended for this audience.
One caveat: I tried the audiobook and couldn't stand the narrator. Your mileage may vary, but I recommend reading it.
This was the only parts of the book I skimmed over / skipped. While interesting, many of them go back to their parents and childhood upbringing which, again are interesting, but being more interested in the science/engineering I would skip ahead until their story was more relevant.
A good book.
May I also recommend the In Our Time episode on the Manhattan Project.
https://www.bbc.co.uk/programmes/m00108h1
(The Richard Rhodes book is on the recommended reading list for this episode, listed on the linked website; as are other very good books on the Manhattan Project worth a read).
I recommend Igniting the Light Elements for people who want a keystone piece about the early thermonuclear. https://www.osti.gov/servlets/purl/10596 - it's an extensive Thesis on the history of early thermonuclear period. Also one of the last comprehensive looks before classification fully obscures the plurality of the programs.
Update, I tracked down the book. The guy was Ford, who worked for Wheeler: https://pubs.aip.org/physicstoday/article/68/7/46/415213/Bui...