I took my daughter to the library, just to return a book, but she wanted to go in. Then, inevitably, she wanted to hold and rearrange each item in a collection of approximately fifty Berenstain Bears sagas. And something else tumbled out. Steven Kellogg is now known for "Pecos Bill," "Johnny Appleseed," "Jack and the Beanstalk"--beautiful, lavish retellings of classic tales. But I hadn't known, early in his career, he had an interest in mystery stories. "The Mystery of the Missing Red Mitten" concerns a little girl, Annie, who may or may not be a victim of theft. Where is that mitten? She has lost five this winter. Here is the challenging thing about a mystery. It needs to reconstruct the past--but, at the same time, there needs to be forward momentum. Alliances need to shift, and shift again, in the present. If it's just a story of one interrogation after another, after another, the plot becomes tedious. The joke of Kellogg's boo...