Don t do it. I understand that it's very tempting to copy an image or text for use in your own projects without asking.
Most people like to be asked.
Obviously the copy of the text of my book is copyright and belongs to me. Quite a few of the pictures in this web site were produced by other people and I asked them all if I could use copies of their pictures on my web site. You need to do the same. Visit his home page for more information.