There are these 3 books about dressmaking that are very out of print.

In English it took me 2 minutes to find them, but in Spanish there’s not a trace and I know for sure that for at least the first two there are PDFs floating around somewhere.

All this made me realise that when I’m looking stuff in Spanish I don’t have any idea on where to look.

Edit: Thanks, I learned a lot. Unfortunately that book I’m looking for is nowhere, at least in Spanish. But not all is lost, apparently there’s a public library at a 30 minutes drive from home that has it, I could go borrow it and scan it myself.