The Woman of Mystery, also known as The Shell Shard, was first published in 1916. It is the eighth book in the Arsène Lupin series by French author Maurice Leblanc. Set during WWI, the novel's plot follows the wanderings of a character in search of both his wife and his father's murderer. This book wasn't originally part of the Arsène Lupin series and in this 1916 edition, Lupin doesn't even feature in it. He was written into the story (albeit a very brief appearance) in the 1923 edition.
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