It is the second book in the Richard Blade series.

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When a computer transported Richard Blade to Dimension X, he found himself in Mortal danger. Dimension X was a land in peril. The aristocratic Caths, besieged by the Mongs, a cruel and mindless people, were constantly engulfed in wars and violence. Richard Blade was their only hope. But he was a man alone - and time was running out . . .