Mark Greaney Teases Plot Info For His Next Gray Man Novel, ‘Gunmetal Gray’

Fresh off the latest hit in his bestselling Gray Man series, Back Blast, Mark Greaney is set to release Gunmetal Gray on February 21, 2017.

While the cover art was revealed a few months ago, plot details have been scarce and hard to come by until today, when Greaney unexpectedly released a pretty awesome-sounding teaser! Check it out below. 

From the publisher:
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