Nuclear Weapon Design

The details of the design, engineering, and manufacture of nuclear weapons is one of the most interesting applied physics stories of the 20th Century. You can learn more about that story here:
Nuclear weapon design

Of course, most of the real nuts-and-bolts knowledge of how to put together a nuclear bomb are jealously-guarded government secrets. This is as it should be. Still, there's a surprising amount of detail out there on the variety of nuclear explosives and how they work, and the high-level details open to the public are fascinating in that spectacular way that volcanic eruptions, hurricanes, and engineering disasters are fascinating. There are very few peaceful applications of this technology, so it's best to hope this knowledge hard-won in laboratories and on chalkboards over the decades stays mostly inert well into the future.