Buy a Bullet is a 2016 thriller short story written by Gregg Hurwitz.
It forms a part of the "Orphan X Thrillers" series by the author.
Being a short story it was published as an electronic book.
[1] The follow-up books in the series are "The Nowhere Man" (Released in January 2017) and "Hellbent" (released in January 2018).
This article about a short story (or stories) published in the 2010s is a stub.