Ian penned several movie novelisations including Splash, Baby, Tough Guys and Down and Out in Beverly Hills.
Ian's Doctor Who books are:
* Doctor Who and the Ark in Space
* Doctor Who and the Sontaran Experiment
* Doctor Who and the Ribos Operation
* Doctor Who and the Enemy of the World
* Doctor Who - Earthshock
* Doctor Who - The Dominators
* Doctor Who - The Invasion
* (The Companions of) Doctor Who - Harry Sullivan's War
* Doctor Who - The Reign of Terror
* Doctor Who - The Rescue
It was while working on the novelisation for The Rescue that Ian passed away. It was was completed by Nigel Robinson.
Ian originally auditioned for the UNIT role of Captain Mike Yates in Doctor Who, before being cast as Harry Sullivan.
Ian adapted more Doctor Who stories to book form than he appeared in on screen (nine book adaptations, seven screen stories).
Ian co-wrote a script with fourth Doctor Tom Baker, that was intended to be a film. It was called Doctor Who meets Scratchman. It failed as the budget of £500,000 could not be raised.