The mountain is called Pendle Mountain after Pendle Hill in England. In 1612, 12 people from the area around Pendle Hill were tried for witchcraft. Mother Malkin was most likely named after Malkin Tower, the house where Demdike (one of the witches tried in the Lancashire Witch Trials in 1612) lived. Malkin was local slang for excrement.
Very loosely based on book one of Joseph Delaney's "The Wardstone Chronicles" series, "The Spook's Apprentice."
In the book, Thomas is only 13 years old.
The books were written by an English writer and are sold in England as 'The Spook's Apprentice' series, but in the US the title was changed as the word spook was deemed offensive.
Kit Harrington did the small role of Mr. Bradley between seasons of Game of Thrones (2011).