A series of "eshorts" featuring each of the 11 Doctors will be released this year in commemoration of Doctor Who's 50th anniversary.
Colfer - who is best known for the Artemis Fowl series - is to pen a new adventure called 'A Big Hand for The Doctor' featuring the First Doctor, who was portrayed by William Hartnell in the classic series.
'A Big Hand for The Doctor' is being released globally via download on January 23.
Additional stories will be out in advance of Doctor Who's anniversary on November 23. A printed anthology will ultimately be available for purchase as well.
More news on the "eshorts" authors will be announced in the coming months.
Colfer has written extensively in the science fiction genre with novels such as The Supernaturalist and the Hitchhiker's Guide to the Galaxy continuation And Another Thing.
Doctor Who's 50th anniversary has been promoted as a major event by showrunner Steven Moffat, who recently promised that the series will "take over television" this year.
The show is expected to return this spring on BBC One in the UK and on BBC America in the US. Watch a trailer for the series below: