Secrets of a War Wizard's Power

From Sword of Truth Wiki

Secrets of a War Wizard's Power is a book written by Barracus for the next War Wizard to be born to the world. It was written 3000 years before Richard Rahl, the next War Wizard born after Barracus, as a instruction guide on how to use their powers. Secrets of a War Wizard's Power is revealed, in Confessor, to be blank. This represents the unspoken eleventh Wizard's Rule.