Some coloring books for adults are "Adult Coloring Book: Stress Relieving Patterns" by Blue Star Coloring Books and "Creative Haven Owls Coloring Book" by Marjorie Sarnat and Creative Haven. Another adult coloring book is "Awesome Animals: A Stress Management Coloring Book for Adults" by Penny Farthing Graphics.
The main focuses of adult coloring books are stress relief, mindful calm and creativity. Blue Star Coloring Books, Creative Haven and Penny Farthing Graphics all have entire series of adult coloring books with different themes. Blue Star Coloring Books has coloring books devoted to themes such as mandala patterns and animal designs. Creative Haven covers themes like cat designs and fanciful faces, and Penny Farthing Graphics devotes its adult coloring books to such themes as mandala and owl designs.