Can I use your materials to make new lessons or even a book for my students?

Thanks for asking. However, I am afraid that is not possible.

All my teaching materials, including Youtube videos, PDFs and information on my website, as well as all course materiasl, are copyright. Any reproduction of them would be a breach of copyright and is illegal.

I recommend you give your students links to my materials on my website, so they can get easy access to them directly on the Internet.