Doctor Who: Time Lord Victorious - Master Thief / Lesser Evils

Master Thief by Fio Trethewey
The Master wants to plunder one of the most secure vaults in the universe, the Repository. He’s got a plan, and a deadly new weapon to assist him. However, as the Master quickly discovers, getting in might be easy, but getting away with it might cost him everything.

Lesser Evils by Simon Guerrier
The Kotturuh have arrived on the planet Alexis to distribute the gift of the death to its inhabitants. The only person standing in their way is a renegade Time Lord, who has sworn to protect the locals. A Time Lord called the Master...