UPDATE: I posted this a little over a year ago, and one person was able to give me a little more info about artist Pat Thompson. "Sparrow1" commented:
"Pat Thompson is an artist in Franklin , TN with Southgate Studios. I was trying to remember which book she illustrated to pass the info along to a friend when I came upon your blog. In years past I have taken pastel classes from her and consider her a both a very fine artist and a lovely friend."
UPDATE 2: You can order this book on Amazon! It's about 18 dollars, but this gorgeous book is well worth it. Here's the link.