Condition: Acceptable. Please see the images for more details. 1969 First Printing. Cover artist not credited in book. Signature not found. Jane Frank's "Science Fiction and Fantasy Artists of the Twentieth Century: A Biographical Dictionary" gives Freas the credit as (Prestige/69).
Blurb: In a world ravaged by science, evolution fights back with the aberration known as Redbeard!
Day of the Mutant
Red Will Donahoe, born barbarian into a world stripped of civilization, was a misfit. All around him were the results of the final blowup that had doomed civilization, skulking in the ruins of the city. And Donahoe skulked, too, hiding from the struggling normal society on the other side of the great river. Hiding not from his own choice, but because he was bound by unseen ties to the man in shadows, Gareth Cole - Master of the Mutants. Cole watched his barbarian grow from childhood, grow into the fierceness of a manhood that could know no peace until it had tasted the rich taste of blood. And Cole, enigmatic ruler of half a world, wondered if he had made a mistake in allowing Redbeard to live.