The Ink Black Heart is a crime novel written by British author J. K. Rowling, published under the pseudonym Robert Galbraith.

Edie Ledwell, an animator who co-created the successful cartoon The Ink Black Heart on YouTube and which is now being adapted into a film on Netflix, visits the agency.

The agency is hired to investigate Anomie's identity by a film producer seeking to adapt The Ink Black Heart.

They also investigate Drek's Game, where Anomie openly confesses to the murder, something treated as a joke by the other moderators, including its co-creator Morehouse.

Two moderators appear to be associated with the Halvening, the far-right group that compiled the dossier with fake proof and the police suspect committed the murder.

After leaving Comic Con, where she interviewed Yasmin, the former employee of Edie and Josh, Robin joins Strike to follow a suspicious individual to a station.

Strike interviews Yasmin himself and discovers that she was being blackmailed by Anomie to login as them on several occasions, rendering much of their work to eliminate suspects moot.

[3] Jake Kerridge from The Daily Telegraph rated the book 3 out of 5 stars, describing the series as a whole as "good comforting crime fiction", but criticising The Ink Black Heart for its length, stating it "[does not] seem to have more depth, or to cover more emotional territory, than the earlier ones did".

[4] Kirkus Reviews called the book "[a]n overblown whodunit", citing length and extensive focus on online conversations as reasons to skip it.

[6] The plot, in which a woman is killed after being accused of various prejudices, particularly transphobia,[12] drew comparisons to Rowling's real-life previous controversial comments surrounding transgender people, leading to allegations of self-insertion.