New Sherlock Holmes novels

There are already quite a number of new Sherlock Holmes books so I'm not sure how newsworthy this is except it's got the backing of a big publisher, HarperCollins. From The Bookseller:

HarperCollins has signed two Sherlock Holmes continuation novels by Hollywood screenwriter Bonnie MacBird.

[] the books will be published in both the UK and the US though Harper 360.

Art in the Blood: A Sherlock Holmes Adventure will be published on 10th September 2015. Set in 1888, it will feature the famous detective, originally created by Arthur Conan Doyle, and his partner John Watson, investigating a new crime.

MacBird is a longtime Holmes fan, whose career included writing the original screenplay for the film "Tron", and winning three Emmy Awards.