Joseph Henry Delaney (25 July 1945 – 16 August 2022) was an English author, known for his dark fantasy series Spook's. He started his career as a teacher and wrote science fiction and fantasy novels for adults under the pseudonym J. K. Haderack. Delaney later wrote under his real name, starting with the publication of The Spook's Apprentice, in 2004, the first book in his Spook's series, which lead to international success. He published 19 books as part of the series, as well as several books which take place in the same universe. In 2014, The Spook's Apprentice, was adapted into a play script and the 2014 feature film Seventh Son. Delaney also published two other series: the science fiction Arena 13 and dark fantasy Aberrations. Source: Wikipedia (en)