Feet Of Clay

''IT WASN''T BY ELIMINATING THE IMPOSSIBLE THAT YOU GOT AT THE TRUTH, HOWEVER IMPROBABLE; IT WAS BY THE MUCH HARDER PROCESS OF ELIMINATING THE POSSIBILITIES.''

Commander Sam Vimes of the City Watch is used to trouble. There''s always trouble in Ankh-Morpork.

But this is new: people are being brutally murdered and there''s no evidence of anything alive having been at the crime scene. At the same time...