@BiggusDiccus No books, I'm afraid. To learn to cooper, I had to watch hours of youtube videos and even then, it's never as good as an actual teacher.
@BiggusDiccus Watch historical documentaries, they often have the best stuff on how it used to be done, especially with hand tools if you're going for that. You can also dig into how people make whiskey and wine barrels today. Modern videos tend to cut parts of the process out though the hobbyists often will at least explain things.
Here are some links:
https://www.youtube.com/watch?v=ccoHCSKMf-E
Any channel recommendations?