The two books, Haunting Adeline and Hunting Adeline, by H.D. Carlton, are a dark romance "Cat and Mouse Duet" about an author, Adeline, who is stalked by a man named Zade. The series explores themes of psychological intrigue, a stalker-victim relationship, and a dark past, as Adeline inherits her great-grandmother's manor and discovers the journals of her ancestor, which detail a similar haunting. The books deal with heavy, adult themes and are recommended for adult readers only.