The Conan Doyle estate has signed up Anthony Horowitz, the author of the YA spy series Alex Rider, to write a new Sherlock Holmes novel. It will be set in Victorian England, aimed at adults, and published in England in September. It has no pub date in the U.S. yet, but even money it’s out just in time to be released with Robert Downey Jr.’s face on the cover. [ArtsBeat/NYT]