This adult coloring book is intricate, detailed, and has many pages filled with cute drawings of nature and animals. It takes hours to do a single picture. I can't do a single page in one sitting, so this book will last me a long, long time. The pages are thick and high quality, unlike children's books - which is reflected in the price. However, you can't use regular markers with this. They will just bleed right through and affect the paper on the other side. This is more suited for colored pencils or gel pens.