Complex sentence: The Wardstone Chronicles (published as The Last Apprentice series in the USA) follow Thomas "Tom" Ward, the seventh son of a seventh son who is apprenticed to John Gregory to become a Spook-a master fighter of supernatural evil.
Split into simpler sentences: The Wardstone Chronicles (published as The Last Apprentice series in the USA) are an examination of a Master/Student relationship particular to the supernatural. The Chronicles follow Thomas "Tom" Ward, the seventh son of a seventh son who is apprenticed to John Gregory to become a Spook-a master fighter of supernatural evil.