A gallery technician poses for photographers during a press preview of the “Harry Potter: A History of Magic” exhibition at the British Library in London in 2017. (John Phillips/Getty Images)

In his March 18 Critic’s Notebook, “Magic money machine ” [Arts & Style], Peter Marks wrung his hands about a Harry Potter mega-business and worried about the effect the Harry Potter play may have on theater as we know it. I have a different take.

Last summer, we took our granddaughter to Platform 9¾ . She was fortunate to see the play as well. Despite the commercialism and hype, I was unexpectedly moved by the sight of young people from all over the world who had made the pilgrimage to King’s Cross railway station.

J.K. Rowling’s books, which have sold more than 400 million copies worldwide, depict a world that abounds with evil. The children seem vulnerable and overwhelmed, yet they grow in awareness of their formidable powers. Knowledge of this power is the priceless gift Rowling has given her readers; it is the true magic of her stories.

This is not mere entertainment, not Disney fluff. It is inspiration for the next generation, who will soon inherit a world of ills.

Livezey More, Washington