Buy books to read now and have in place in your safe spot.

Store PDFs on a $5 thumb drive or on your phone.

Free Survival Manuals on PDF:

Survivor Library – many hundreds of free PDFs. They are typically very old books, out of copyright. Lots and lots of categories – for example Poultry has dozens of books, but most are 100+ years old. That’s not the best but better than nothing.

ZetaTalk Library – it is big, and the quality is mixed.

The Preparedness Encyclopaedia – one large compilation

LDS Preparedness Manual – the LDS (Mormons) are very into survivalism and this book is an excellent resource. It is not hard to find it for free online.