Modern Meditation - Colouring for Focus and Creativity (A Colouring Book for Adults)  (English, Paperback, Dr. Stan Rodski)

It contains mostly geometrical patterns, curly wavy designs are outnumbered.
The paper quality isn't for sketch pens or watercolours (paper is thin and fragile).
If to use the sketch pens, you can only colour by gentle strokes. No colour blending is possible, paper gets worn out. The same is with water colouring.
To colour with colour pencils won't give that much colour brightness.

Half of the drawings are cool, stylish, modern. Other half is not so interesting.
So you have half of a book ...