Raisa Susanto Books in Order

The Raisa Susanto series centers on FBI forensic linguist Raisa Susanto and FBI forensic psychologist Callum Kilkenny. Their cases are built around language, behavior, old wounds, and the kind of written clue most people would skim right past. Raisa studies how people use words, not just what they say, and that gives the series a different texture from a standard FBI thriller.

Words are evidence here.

In The Lies You Wrote, Raisa and Callum are pulled into a double murder in a small Washington town. The crime appears to echo a decades-old case in which Alex Parker was believed to have murdered his parents and then died by suicide. A confession note, online conspiracy theories, a content moderator, and a true-crime podcaster all complicate the question of what really happened then and what is happening now.

The series is interested in the gap between a solved case and a true one. Raisa reads patterns in phrasing, tone, and written habits, while Callum brings the behavioral and psychological side of the work. Their partnership gives the books a steady professional center, even as the cases push into deeply personal territory.

The Truth You Told turns toward Callum’s past. A serial killer on death row, Nathaniel Conrad, claims that he did not murder Callum’s wife, Shay. Raisa sees problems in the killer’s coded letters, and that pulls both agents into a case Callum thought was already finished. It is a good example of the series’ favorite move: reopen a closed door, then show how much darkness was still behind it.

By By the Time You Read This, Raisa’s own history is pressing hard against the work. Her sister Isabel, a notorious serial killer, sends a final message before being found dead in prison. When new murders appear to copy Isabel’s methods, Raisa and Callum have to deal with more than a killer. They also face the strange public hunger that grows around true crime, fandom, and infamy.

The Raisa Susanto books are best read in order. Each mystery has its own engine, but the emotional stakes build from book to book, especially around Raisa and Callum’s pasts. Expect twisty FBI suspense, forensic language clues, family secrets, and cases where the written record is never as simple as it looks.