Here’s an example of a book available at this vintage crochet site. There are so many wonderful antique crochet books available there. Nothing for free that I could find, but well worth a browse.
Here’s a wikipedia.org article about the crochet designer who is the focus of the website:
Another site that is full of antique crochet books and leaflets for sale is:
Also, check out this blog for a lovely ‘shoulderette’:
Scroll almost to the bottom of this collector’s site to see a couple of vintage hook holders – commercial quality I think:
Finally, here’s a site where you can download some oldies for free. Can’t go wrong with that. Just remember that some books do not use US terminology so stitches may differ and other terminology changes with time. Rather than lunge headforward into a vintage pattern thinking you don’t need to make any adjustments or adaptations, one might do better to research a bit first. Hope you enjoy these vintage goodies: