The Crystal Snare (novel)

The Crystal Snare 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...

People from all over the world were amazed at the exhibits on display at the Great Exhibition — and they didn't even see the alien visitors! Help the Doctor and Martha put a stop to the aliens' plans, before they wreak havoc on humankind...

Characters

 * Tenth Doctor
 * Martha Jones
 * Isambard Kingdom Brunel