I loved the old fashioned quality of the artwork. It is like the pictures in classic children’s books many years ago. In fact it is almost as appealing to me as Pauline Baynes’ illustrations. But of course, I am very old fashioned in my taste and will usually like something that looks vintage. :)

Lucy’s red hair color doesn’t make that much difference to me. I think the children look much like they do in the book, and the places in Narnia and our world are pretty accurate to those in the original stories. The colors that the artist used are bright, and the backgrounds are beautiful. 

I will say though that Peter and Edmund almost look a bit like the elves in Lord of the Rings. But overall, the artwork is nice.

https://www.deborahmaze.com/portfolio/the-chronicles-of-narnia

They are by Deborah Maze, and are very colorful and close to the spirit of the books. I am not sure if they are watercolors. And of course they are child friendly.  I really like them, and they appeal very much to my taste.  :)

In fact I think Lewis was more realistic about his talking animals than Graham was in The Wind in the Willows.  Lewis made them act and look like real animals, which is the way they should appear in the illustrations.  Pauline Baynes portrayed them like that, and she probably was the best artist to illustrate Narnia.

At first I thought the illustrations were almost too cute, but I liked them anyway.  I think that the pictures of  Peter, Susan, Edmund, and Lucy as adult kings and queens were closer to the books.  Probably a female artist would show children as being more cute. :)

Some of these are a little too cutesy for my tastes (Mr. & Mrs. Beaver, specifically) but her style is beautiful. 

I don’t know where you can actually buy Natasha’s artwork other than on the mugs. I think it probably deserves to be published in books or something like that. But I am no expert in art.  I only know what I like, and the paintings are among the best Narnia pictures I have ever seen. :)

Is this actually published? 

I don't like illustrations modernising the children or making them or other characters cute, but there's one I do like - Lucy in her huge coat!

And yes, blonde Lucy is how Lewis described her.