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218 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced
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204 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

204 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

246 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

246 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

178 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

218 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

132 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

169 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

176 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced

160 pages first pub 1968 (editions)

fiction science fiction young adult adventurous medium-paced