224 pages first pub 1981 (editions)

fiction science fiction adventurous challenging slow-paced

320 pages first pub 1984 (editions)

fiction science fiction adventurous challenging fast-paced

304 pages first pub 1985 (editions)

fiction science fiction adventurous challenging medium-paced

400 pages first pub 1986 (editions)

fiction science fiction adventurous challenging medium-paced

416 pages first pub 1992 (editions)

fiction science fiction adventurous medium-paced
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