Terrance Dicks
Book 64 of Doctor Who: Target
Language: English
Google Books ISBN
Fiction General Science-Fiction:Doctor Who science fiction
Publisher: W.H. Allen
Published: Nov 15, 1975
Description:
With the entire Universe in danger, Doctors One, Two, and Three have to cross time and come together to battle Omega, a ruthless ex-Time Lord now exiled in a black hole and seeking a bitter and deadly revenge.