Joseph Henry Delaney (25 July 1945 – 16 August 2022) was an English author best known for his dark fantasy series, Spook's. Initially embarking on a career as a teacher, Delaney also penned science fiction and fantasy novels for adults under the pseudonym J. K. Haderack. He later transitioned to writing under his real name, beginning with the publication of The Spook's Apprentice, in 2004. This marked the start of his widely successful Spook's series, which eventually encompassed 19 books along with several others set in the same universe. In 2014, The Spook's Apprentice was adapted into both a play script and the feature film Seventh Son. Additionally, Delaney published two other series: the science fiction-themed Arena 13 and the dark fantasy Aberrations. Source: Wikipedia (en)