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The Blue Hole
Science fiction series about the discovery of a gateway in time and space deep underwater
which allows for travel between the present day and the age of the dinosaurs.
Featured Series
2 primary booksブルーホール [Blue Hole] is a 2-book series with 2 released primary works first released in 1992 with contributions by Yukinobu Hoshino and 星野之宣.
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