Adult coloring books topping bestseller lists

Photos: Coloring books for adults
Coloring book titles like Johanna Basford's "Secret Garden" are selling well in the adult market. Basford's first book has topped the Amazon.com bestselling books list. Click through for more coloring books suitable for adults.
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Photos: Coloring books for adults
Illustrator Johanna Basford's second book, "Enchanted Forest," also made the bestseller lists.
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Photos: Coloring books for adults
"The Mindfulness Colouring Book: Anti-stress art therapy for busy people" by Emma Farrarons is high on the Amazon UK bestselling books list.
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Photos: Coloring books for adults
Art therapist Susanne Fincher uses her own coloring books, such as "Coloring Mandalas 1" as "homework" for patients to maintain continuity between their therapeutic visits.
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