Never before reprinted since its original appearance in 1957, The 13th Immortal is Robert Silverbergs first adult novel ever published!

The 13th Immortal 2009, Cosmos Books, New York, NY

ISBN-13: 9780843959512

Mass-market paperback

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The 13th Immortal 2004, Cosmos Books, Holicog

ISBN-13: 9781930997769

Trade paperback

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