- Tom Percival is the cover artist for the series. However he did not return as cover artist for Derek Landy's Demon Road Series.
Nothing has been released about Percival's history on any of the Skulduggery Pleasant websites. However, there is quite a lot on Wikipedia.
- Tom has made two covers for each book.
- Tom has also made the new covers for the paperbacks.
- He also made the covers for the three novellas.
- He also made character art.
- Tom has been one of the people subject to Derek's praise in the acknowledgements in the book series. In it, Derek says that he could easily do the art for the covers, so Tom deliberately does a stand up job each time to avoid this. He then threatened to replace Tom by more dubious means.
- The End of the World was dedicated to him.