Dark Union (Gray Man #16)

Dark Union (Gray Man #16) by Mark Greaney is an upcoming book (publication date is a placeholder and will be updated soon).

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Dark Union (Gray Man #16)

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Dark Union (Gray Man #16) Release Date: February 9, 2027

Coming Soon

Dark Union, the 16th installment in the Gray Man series, is the upcoming book from author Mark Greaney, set to release in 2027.

Full details and cover coming soon.

The Hard Line (Gray Man)
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04/17/2026 09:15 am GMT

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Genre: Thriller

Mark Greaney

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