The circulation manager at News in Adelaide wrote to newsagents saying that they, newsagents, should direct customers to News and the company will endeavour to assist. Note the line written by someone who has not spent enough time serving customers at a newsagency counter:
I must stress that you should make no commitment to the customer that they will definitely be supplied their order.
News is heavily promoting the Mr Men books in its newspapers and on national TV. It would / should have known the success the campaign could achieve and should have ensured sufficient supply in South Australia. Thankfully, I am not experiencing short supply in Victoria.