These aren't your kid's coloring books. But don't worry — they're safe for work.
So-called "adult coloring books" stand at the top of Amazon's best-sellers list, Business Insider reports. The books don't feature adult themes; rather, the illustrations are more complex and geared toward adults.
The two books, "Enchanted Forest" and "Secret Garden" by illustrator Johanna Basford, feature highly detailed outlines of drawings, along with hidden objects for readers to find.
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The Amazon.com description of "Enchanted Forest" calls it a "stunning new colouring book" that "takes readers on an inky quest through an enchanted forest to discover what lies in the castle at its heart."
The pair of activity books aren't alone. Coloring books targeting adults have become increasingly popular in the past year, Business Insider reports, with titles ranging from calming cues — "Color Me Calm: 100 Coloring Templates for Meditation and Relaxation" — to pop culture tributes — "Unicorns are Jerks" and "The Hipster Coloring Book For Adults: You've Probably Never Colored It."
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