Why is this book different from all other coloring books? Because unlike all other coloring books it is based on continuous line drawing technique (also known as single line drawing or contour drawing) when a single, unbroken line is used to create the whole image. Aside from the fact that a continuous line drawing can be a useful drawing exercise for artists to develop their skills, it is also a piece of art in its own right.
Yes, it looks challenging to color but it would look amazing if done right! Feel free to download a free sample from this book.
Thank you and happy coloring!