Ī number of supplementary short tales that are all placed a few months after the plot of each book were included with the new paperback releases. In October 2022, Landy announced via YouTube livestream that a 'one-off prequel' and 'Book 0♱', Hell Breaks Loose, would release in March 2023. The final book, Until the End, was released in April 2022. While nine books were planned, the series was cut down to six books by HarperCollins after the publication of Seasons of War. The first book of this sequel was released in June 2017, titled Resurrection. In July 2016, Derek Landy announced via a video blog that, although the Skulduggery Pleasant series was complete, the series as a whole was still set to continue with a sequel series. The new books in the second series began to be published annually in June 2017. The final book in the first series was published in August 2014. The success of the first novels ensured that the deal was extended first to six books and in 2011, HarperCollins signed the deal for the third and final trilogy.

Landy was initially contracted to write three books, with any further books depending on how well the first trilogy sold. The following novels were released each year afterward, with the exception of the fourth and fifth novels, Dark Days and Mortal Coil, which were both released in 2010. The first novel was published in April 2007. Since the release of the first novel in 2007, Skulduggery Pleasant, the series has been praised by both readers and critics. The novels are broken up into 5 trilogy sets with 2 prequel novels and 15 short tales. The central story concerns Valkyrie's struggle to stop evil forces threatening the world and her internal struggle to resist the darkness within. The books revolve around the adventures of fledgling detective Valkyrie Cain and her mentor Skulduggery Pleasant, along with other friends and allies.

Skulduggery Pleasant is a series of dark fantasy novels written by Irish author Derek Landy.

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