What are you puzzled about? The character Holly is actually reading the book in season 5 of Stranger Things. An episode is called Camazotz. She refers to a characters as Mr. Whatsit.What's puzzling about your statement, @bdub76, is that Wrinkle was published in 1962, whereas Chainmail, the immediate predecessor of D&D, was published in 1971.
No criticism intended; I'm just very, very puzzled (apologies to Mel Brooks and Gene Wilder).
This might help. Have you seen season 5?
This Classic Sci-Fi Novel Holds the Key to Unlocking 'Stranger Things 5's Biggest Mysteries
Madeleine L'Engle's classic sci-fi novel A Wrinkle in Time holds the key to understanding the biggest mysteries in Stranger Things Season 5.