It’s rare that a national news story surfaces right at my sweet spot of journalism, book publishing, and Chicago, but yesterday, May 20, was one such special day. On that day, it was discovered by a reader on BlueSky that the May 18 Sunday edition of the Chicago Sun-Times, one of the city’s two daily papers, had published a 64-page summer-themed insert titled “Heat Index” that appeared to have been largely generated by AI hallucination. A section on “summer reading” recommending fake books by real authors like Isabel Allende and Rebecca Makkai was what tipped astute readers off.