1. Ahsan, Sadaf (2015), ‘Adult colouring books are the most wished for, according to Amazon Canada’, National Post, 9 November, http://news.nationalpost.com/arts/books/adult-colouring-books-are-the-most-wished-for-according-to-amazon-canada. Accessed 1 May 2019.
2. Alter, Alexandra (2015), ‘“Game of Thrones”: Now, the coloring book’, New York Times, 9 June, http://artsbeat.blogs.nytimes.com/2015/06/08/game-of-thrones-empire-expands-to-include-coloring-book/. Accessed 1 May 2019.
3. Barry, Aoife (2015), ‘Adult colouring books are the new mindfulness’, TheJournal.Ie, 15 August, http://www.thejournal.ie/colouring-books-for-grown-ups-2264550-Aug2015/. Accessed 1 May 2019.
4. Begley, Sarah (2015), ‘Get your crayons ready for a “Game of Thrones” coloring book’, Time, 8 June, http://time.com/3912878/game-of-thrones-coloring-book/. Accessed 1 May 2019.