His first, and only, hardbound novel, The Involuntary Immortal, enlarged from a Fantastic Adventures novelette (December 1949) was published by Avalon in 1959 only a few years before he started to become too sick to continue to write.
His first and only hardcover novel, "The Involuntary Immortal," which originated as a short story in the "Fantastic Adventures" series (December 1949), was released by Avalon in 1959, just before his health deteriorated to the point where he could no longer write.