The Prize Fighter Inferno is technically a separate project than frontman Claudio Sanchez's main band, the progressive metal outfit Coheed Cambria. However, the two groups are still very much associated with one another, due to the narrative -- a multi-generational blood feud between three families known as the Amory Wars -- that connects all of their albums together. Adopting a more nuanced acoustic/folktronica/indie rock style, My Brother's Blood Machine appeared in 2006, followed by a string of EPs that ushered the adjacent story into the next decade. Sanchez's sophomore long-player under the Prize Fighter Inferno moniker, The City Introvert, arrived in 2021.

Sanchez, the lead singer and lyricist of Coheed Cambria, also pens an ongoing online graphic novel that fleshes out the long-running group's primary story line. Sanchez had been working on Prize Fighter material intermittently for almost seven years before releasing any material. Finally issued on Halloween 2006 through Equal Vision, the Prize Fighter Inferno's debut, My Brother's Blood Machine, is a concept album told from the point of view of Inferno (aka Jesse, Coheed's brother), one of the major characters in the Coheed Cambria mythology, and who died on the band's 2005 album Good Apollo I'm Burning Star IV, Vol. 1: From Fear Through the Eyes of Madness; he tells a self-contained story that both predates the story line of the Amory Wars and sets up part of its plot. Recorded primarily solo by Sanchez, My Brother's Blood Machine is a mostly electronic-based indie rock album, wholly different than Sanchez's usual work. He continued to explore the narrative on a series of EPs, and in 2021 he released the intimate full-length outing City Introvert, which eschewed the mythology of previous efforts for a more personal and inward-looking set of songs. ~ Stewart Mason & Cory Apar, Rovi