http://www.radiotimes.com/news/2013-01-03/series-of-doctor-who-short-stories-announced-to-celebrate-50th-anniversary

To celebrate the 50th Anniversary, the BBC are going to release a series of Doctor Who 'eShorts' throughout the year, written by prolific Childrens authors.

11 stories, costing £1.99 each, will be released over the next 11 months, each featuring a different incarnation of The Doctor, starting with William Hartnell's First Doctor on the 23rd of January - the author of which will be announced on Monday. Once all 11 stories are released digitally, Penguin will be publishing them as a collection for £7.99.