Thaneeya McArdle has done a number of coloring books for Design Originals. Nature Mandalas Adult Coloring Book
is a very interesting one, with 30 illustrations to color. In the front of the book, the author has included a number of pages on shading and color theory, as well as a several of the pictures already colored for you as suggestions.
While I do not mind a few already colored designs to look at, I feel that there are too many of these. The drawings themselves are very simple. This is a very good book for the beginning colorist, but will not provide enough of a challenge for the more experienced adults.
