Seventh Son. Poster of the 2014 movie and cover of the 2004 book, The Spook's Apprentice
VS3
The Spook's Apprentice
Joseph Delaney, 2004
movie vs book
Sergey Bodrov, 2014

John Gregory, who is a seventh son of a seventh son and also the local spook, has protected the country from witches, boggarts, ghouls and all manner of things that go bump in the night. However John is not young anymore, and has been seeking an apprentice to carry on his trade. Most have failed to survive.