21 Coloring Books That Will Calm You The Heck Down
Sometimes all you want to do is color inside the lines.
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8. Patterns of the Universe: A Coloring Adventure in Math and Beauty by Alex Bellos and Edmund Harriss
17. Disney Princess: 100 Images to Inspire Creativity and Relaxation by Catherine Saunier-Talec and Anne Le Meur
Thanks to all the commenters on this post who noted how much coloring has helped with their mental health struggles.