Paul Cornell 
Doctor Who 
The Third Doctor Collection

How could you ever win against a deadly hive mind robotic intelligence, capable of creating itself infinite bodies out of thin air? Join forces with the Third Doctor, the infamous U.N.I.T., and a host of staggering guest stars to find out! Twists and turns ensue as the Doctor, the Brigadier, and the Master continue their struggle – and surprisingly a familiar face returns!