The Adventures of K9

The Adventures of K9

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The Adventures of K9 was a series of four illustrated paperback storybooks for children written by David Martin and published by Sparrow Books in 1980. The four books feature K9, the character Martin co-created.

Specifically, the stories feature what is most likely to be K9 Mark I and seemingly take place sometime after the events of DW: The Invasion of Time when the Doctor left K9 on Gallifrey.

The books include prefaces that indicate that K9 is working on behalf of the Time Lords (which opens the possibility that this could also be K9 Mark II, depicted in many spin-off media as eventually returning to Gallifrey with Romana who becomes Lord President.

A total of four books were published:

1. K9 and the Time Trap
2. K9 and the Beasts of Vega
3. K9 and the Zeta Rescue
4. K9 and the Missing Planet

They also suggest that the Doctor's real name might be the Theta Sigma nickname heard in The Invasion of Time and DW: The Happiness Patrol.