It's okay! All the images are still here!
The link you followed took you to a page that no longer exists or is badly broken because I'm working on it. Sometimes there's a typo in the URL but more likely the image has moved. I've recent updated the website and shopping cart for mobile devices so things may break.
Instead of having a single page for every illustration / art print, I've organized them by author and book so inlinks will be taking you to this page often for awhile. The easiest way is to follow the artist link in the Catalog of Artists. Searching on the artist name below will give you links to all books with illustrations here. It won't take you to a particular image, however, because it only searches titles and headings.
Each artists page has a link to "Album", the Art Passions album that lists all the images. Many of these images are also available as prints, just contact me and I'll send you a link.