article_snippet.sent: A colouring book has become a sell-out success thanks to an unusual twist
article_snippet.sent: Now, A colouring book has sold out within weeks of A colouring book release.
article_snippet.sent: Some 226,000 copies were scooped up last month and the publishers have now printed another 250,000.
article_snippet.sent: I didn’t do any market research.
article_snippet.sent: We initially printed 13,000 copies and I honestly thought my mum was going to have buy a lot of books just to save face.
article_snippet.sent: People using the books include investment bankers, academics and lots of people in finance.