This book contains 20 line art coloring pages (and 3 bonus greyscale pages). The illustrations are printed on one side of the paper, so you can use any medium and not worry about destroying another picture. The paper thickness is 105 GSM, it s perfect for colored pencils, pastel, pens and markers. The illustrations were drawn by two young artists and twin sisters - Alexandra ("Kitty") and Evgenia ("Jen"). If you love fantasy and gothic art - this book is definately for you!