The illustrator is Kevin Reilly, but sometimes a different person does the jacket design. It reminds me a little of Brian Froud's work. (I wish he'd do some JRRT illus.)

Aw shucks, it was elementary, my dear Sauron...

Yes Elanor, that is it. We are going to start calling you Holmes.

Hey, Sauron, this must be the dragon painting you remembered, and the book is just about still available:

http://www.amazon.co.uk/Dragonworld-Byron-Preiss/dp/0671039075

Thanks for that info, STW - I knew that picture reminded me of something - now I know, it was Arthur Rackham's fairytale illustrations!

Zucker never amounted to much as a fantasy illustrator. I remember him doing a dragon for some anthology many years back but then he simply vanished. I have not seen a litho of this particular painting. Zucker greatly admired the work of Arthur Rackham - the British ilustrator who has inspired so many great illustrators including Michael Hague.
Glad to be of some help.

Thank you! I'm a little less crazy for the information...now to find where I can get a print of the cover or other lithograph art from him. I'm appreciate everyones help!

JOSEPH ZUCKER is the artist of that cover.

This website shows all the different covers for this book: http://www.librarything.com/work/3315221/covers/

Have you contacted the publishers about it, or have they gone out of business ?

Strictement aucune idée.

I've been searching for the answer to this one for a long time. I know the Hildebrant Brothers did a cover for a companion, but I'm looking for the artist that did the watercolor artwork featured. It's driving me crazy!

no Ken Leeder is a cover designer, i think Uruk-Hai is looking for the artist.

I think this might be the answer you are looking for :-

http://www.alibris.com/booksearch.detail?invid=9296601890&browse=1&isbn=9780333196335&qsort=&page=1

The cover shown is I think the one by the Hildebrant Brothers, and is not the one referred to in the write-up below. It could be your edition - check the ISBN if you can find it in your copy. If it matches then the artist is Ken Leeder.

Maybe on the hardcover, but not on the softcover (which is the one I own). The illustrations are by Kevin Reiley, but he didn't do the cover art.