Department Q is a series of crime thriller novels by Danish novelist Jussi Adler-Olsen. The series follows Carl Morck, one of the best homicide detectives in Copenhagen who has been promoted to the cold case department.

The Department Q series originally began in Danish with Kvinden i buret in 2007. In 2011, it would be translated into English and published in the UK as Mercy and in the USA as The Keeper of Lost Causes. Below is a list of Jussi Adler-Olsen’s Department Q books in order of when they were originally published in their English language editions:

Publication Order of Department Q Books

The Keeper of Lost Causes(2011) Best Hardcover PriceBest Paperback PriceBest Kindle Price
The Absent One(2012) Best Hardcover PriceBest Paperback PriceBest Kindle Price
A Conspiracy of Faith(2013) Best Hardcover PriceBest Paperback PriceBest Kindle Price
The Purity of Vengeance(2013) Best Hardcover PriceBest Paperback PriceBest Kindle Price
The Marco Effect(2014) Best Hardcover PriceBest Paperback PriceBest Kindle Price
The Hanging Girl(2015) Best Hardcover PriceBest Paperback PriceBest Kindle Price
The Scarred Woman(2017) Best Hardcover PriceBest Paperback PriceBest Kindle Price


Notes: The Keeper of Lost Causes was published as Mercy in the United Kingdom. The Absent One was published under the title of Disgrace in the UK. A Conspiracy of Faith is titled Redemption in the UK. The Purity of Vengeance is titled Guilt in the UK. The Marco Effect is also known as Buried.

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