Mammals f.g. c.b.
You can always tell a good coloring book from a more "amateurish" one by the quality of the illustrations (how true-to-life they are and by the variation of the ink line widths, the quality of the paper, the durability of the covers, etc.) We rate this series as being of highest quality. In fact, these are excellent books to practice your color pencil work, shading and blending, with colored pencils or crayons. 64 pages each, paperback, 81/2"x11".