"Blue on Black" is a short-story written by Michael Connelly, featuring LAPD detective Harry Bosch and FBI agent Rachel Walling.

The story was first published in the 2010 anthology Hook, Line & Sinister, and shares its title with a 1997 Kenny Wayne Shepherd song.

On 6 September 2016, the story was released for the Kindle as a Mulholland Books Strand Original.

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