Alien Arena (novel)

Alien Arena was a Decide Your Destiny book released in 2007.

Publisher's summary
Join the Doctor and Martha on their travels through time and space and influence the story with your decisions. Choose a direction and let the adventures begin...

You're on an alien prison ship in the midst of a mutiny! The ringleader, Mr Big, has created an arena, where aliens from all over the universe are fighting each other. Only your quick wits, and a little help from the Doctor and Martha, can help you escape the arena!

Characters

 * Tenth Doctor
 * Martha Jones

Worldbuilding
to be added