Here's a mystery we're in the midst of unraveling: Somehow in the production process of your Sunday Deseret News, a Salt Lake Tribune page found its way into our paper. Page E5, an Arts Section page, is a stray.

Our E5 was supposed to feature timely literary footnotes and book reviews, which we're sure you'd prefer over the page as published, but . . . .The Deseret News and Salt Lake Tribune share production facilities through the Newspaper Agency Corp., the company that also handles the advertising and distributes the daily and Sunday papers. The Sunday newspaper, as those who deliver it will testify, is also bigger, so some feature-oriented sections are printed ahead of time - the Arts Section being one of them. Sometime early Saturday, the mistake was made on E5.

Maybe we should consider this a collector's item.