The Gallifrey chronicles - Lance Parkin

The Doctor's home planet of Gallifrey has been destroyed. The Time Lords are dead, their TARDISes annihilated. The man responsible has been tracked down and lured to Earth in the year 2005, where there will be no escape. But Earth has its hands full - a mystery signal is being received from a radio telescope, there's a second moon in the sky, and a primordial alien menace has been unleashed. The stage is set for the ultimate confrontation. Now, the last of the Time Lords must ensure that justice is done. The Doctor and his companions Fitz and Trix will meet their destiny. And this time, the Doctor isn't going to be able to save everybody. This is the last in the continuing series of original adventures of the Eighth Doctor.