Can you tell me where i can download free books for crochet&knit?

I don't know about free books, but have you tried just going to Google and typing in "crochet" and "knit"? I did that once when I was trying to figure out how to use a certain type of fancy foot on my new sewing machine for making a hem. It turned out there was a little video on YouTube that showed exactly how to use the foot on the machine, how to fold the material, how to push the material through the machine, and how the stitch should look when you are done. It made a lovely blind hem that doesn't show on the outside if you do it right. My machine and I weren't as good at it as the lady in the video, but without her instruction I couldn't have done it at all. The two-sentence instruction in the book that came with the machine made no sense to me and the illustration in the book didn't help enough. But the video was very clear. I'll bet you could find something on Google. It might not be a video, but there's bound to be something.