The Hangman is the 3rd book in The Forgotten Series by Mary Burton. This is another excellent book in the series where she has expanded and added new characters. I like how she takes secondary or tertiary characters from a previous book and makes them the main characters in the next book. She develops their character out during the main mystery in the book. If there are future books in the series it would be great to take the main characters from 2 books and build on them working together to solve the next mystery.