About this ebook
你目睹过某个人突然从身边消失过吗？你可曾听说过有人凭空消失的事迹吗？地球我们的家园，不知道藏有多少的秘密，让人寻觅。《人类失踪之谜》一本记载人类神秘失踪的书，让我们在轻松的氛围里品阅存在于地球的奇人异事。
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