Features a taboo "adopted uncle/niece" relationship. Age Gap: Includes an eighteen-year age difference.
The book is available in several physical formats which may include the "useful paper" or collectible aesthetic you are seeking: Brutal Conquest by Lilith Vincent
The story follows Kristian, a man banished from the Belyaev crime family, who returns to claim his birthright by taking Zenya Belyaev—the girl who inherited what should have been his. Tropes & Themes: Features a taboo "adopted uncle/niece" relationship