In some cases, a book may be originally published under a pen name, but then later reissued under the author's original name. When this happens, the author listed for any and all editions should be the author name the book was originally published under - so the reissued edition would need its author name changed to the originally published pen name. Doing this will allow the various editions to be combined.
Different editions of a book not having the same primary author can cause quite a few distinct problems. Please keep the primary author for all editions of a work the same.
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