The Slitheen Excursion

The Slitheen Excursion is a BBC Books original novel written by Simon Guerrier and based on the long-running British science fiction television series Doctor Who. It features the Tenth Doctor initially without a companion, most likely following on from the fourth series finale Journey's End. During the story he does acquire a temporary companion in the form of university student June who—while still with him at the end of the story—does not appear in any other adventure. It was released on 2 April 2009, alongside Judgement of the Judoon and Prisoner of the Daleks.