As per title. I'm planning on building a physical library. I have already started collecting books, but these are mostly non-fiction books that are mostly intellectual, not practical.

I'm looking for suggestions regarding manuals, encyclopedias that have PRACTICAL knowledge to be used in case of internet collapse.

I don't have the resources to buy originals, it would cost me thousands of euros, so I will self print them from pirated pdfs.

Give me your suggestions. Thnx in advance!