Colouring-in for adults is a hugely popular hobby. Books aimed at more dextrous grown-ups have topped Amazon's book charts and have displays all to themselves in bookstores throughout the UK.

Colouring-in such books has become a form of creativity for people with a wide range of artistic talents – often linked to the idea of mindfulness, a form of relaxation that encourages people to use activities to focus themselves away from day-to-day worries.

As with any big trend, there are many who wish to cash in on colouring-in for grown-ups' popularity – and both online and high-street bookstores are awash with poorly drawn, badly printed colouring books that even a four-year-old would turn their nose up at. So here we've collected five of the best, all created by super-talented professional illustrators who we've featured on Digital Arts in the past.

Whether you're looking for a bit of relaxing colouring in yourself or a gift for a friend or relative, read on to discover the five best adult colouring books.

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