The bestselling title on Amazon in the US is not Harper Lee’s hugely anticipated second novel, Go Set a Watchman, nor George RR Martin’s Song of Ice and Fire fantasy series, nor even Zoella’s much-mocked but much-bought young adult hit, Girl Online . Instead, Scottish illustrator Johanna Basford is topping the charts with her colouring books for adults, taking top spots on Amazon.com’s bestseller lists. Basford’s intricately drawn pictures of flora and fauna in Secret Garden have sold 1.4 million copies worldwide to date, with the newly released follow-up Enchanted Forest selling just under 226,000 copies already. They have drawn fans from Zooey Deschanel, who shared a link about the book with her Facebook followers, to the South Korean pop star Kim Ki-Bum, who posted an image on Instagram for his 1.6 million followers. “It’s been crazy. The last few weeks since Enchanted Forest came out have been utter madness, but fantastic madness,” said Eleanor Blatherwick, head of sales and marketing at the books’ publisher, small British press Laurence King. “We knew the books would be beautiful but we didn’t realize it would be such a phenomenal success.” And it is not just Basford who is reaping the benefits of the hordes of adults who, it turns out, just wanted something to colour in. In the UK, Richard Merritt’s Art Therapy Colouring Book sits in