Craig Russell, also known as Christopher Galt, is a Scottish novelist, short story writer and author of The Devil Aspect. His Hamburg-set thriller series featuring detective Jan Fabel has been translated into 23 languages. Russell speaks fluent German and has a special interest in post-war German history. His books, particularly The Devil Aspect and the Fabel series, tend to include historical or mythological themes.

In February 2007, Russell was awarded the Polizeistern (Police Star) by the Hamburg Police, the only non-German ever to have received this accolade. In June 2007, Russell was shortlisted for the £20,000 CWA Duncan Lawrie Gold Dagger, the world's largest literary prize for crime fiction. Also in 2007, Russell was shortlisted for the SNCF Prix Polar Award in France.

He was the winner of the 2008 CWA Dagger in the Library. His novel Dead Men and Broken Hearts was a finalist for both 2012 inaugural Bloody Scotland Crime Book of the Year Award and the 2013 Ellis Peters Historical Dagger. In 2015, his novel The Ghosts of Altona won the Scottish Crime Novel of the Year at the Bloody Scotland Festival. He was again shortlisted for the McIlvanney Prize in 2017 for The Quiet Death of Thomas Quaid, and The Devil Aspect was shortlisted for the 2019 Wilbur Smith Adventure Writing Award. Russell won the 2021 McIlvanney Prize for his novel Hyde, making him the first in the prize's history to win twice.

In 2014, he wrote the book Biblical under the pseudonym 'Christopher Galt'. In April 2015, The Third Testament was released under the same name.

Having been acquired in an auction by Jason Kaufman, Dan Brown's editor at Doubleday, Russell's Gothic thriller The Devil Aspect was published in the United States in March 2019, the film rights (under the title Where the Devil Hides) having already been acquired by Columbia Pictures/Sony. The UK edition was published by Constable/Little, Brown.