The Historian follows several historians whose research has led them too close to Dracula as they hunt the vampire across Europe. Meg Cabot's 2010 novel Insatiable has a main character named Meena Harper who has a relationship with Dracula's son, Lucien. In the book series Vampire Hunter D, which takes place 10,000 years in the future, D's adversary Count Magnus discovers that D is the son of Dracula, who is referred to as "the Sacred Ancestor" in the series. Freda Warrington's Dracula the Undead is an unofficial sequel to Dracula. Will Hill's Department 19 is about Jamie Carpenter, a descendant of Henry Carpenter, Van Helsing's valet who saves Van Helsing's life multiple times. Department 19 (or Blacklight), is an organization started by the people from the original Dracula, and they fight vampires across the world. Dacre Stoker, a great-grandnephew of Bram Stoker, co-wrote with screenwriter Ian Holt a 2009 sequel to Dracula titled Dracula the Un-dead (Stoker's original title), which reveals that Dracula was not actually the true villain, but sought to eliminate the more dangerous Elizabeth Bathory, the storyline also revealing that Quincey Harker is actually the son of Mina and Dracula and ending with the death of all the characters while the sole survivor, Quincey, is last seen boarding the R.M.S. Titanic on her maiden voyage. Dacre Stoker claims that parts of the work are based on excised material from the original novel and Stoker's notes. In North America, the book was published by E.P. Dutton. Dacre Stoker also co-wrote a 2018 prequel with J. D. Barker titled Dracul, with Bram Stoker himself as the book's central character. A Betrayal in Blood by Mark A. Latham takes an unconventional interpretation of the original novel when Sherlock Holmes is hired by his brother Mycroft to investigate Dracula's death. In the course of the novel, Holmes confirms that Dracula was not a vampire, but in reality his death was part of a complex plan orchestrated by Van Helsing; a former German agent, Van Helsing was acquainted with Dracula in their youth, but after Dracula had an affair with Van Helsing's wife that resulted in the birth of a son, the son was given up for adoption to become Arthur Holmwood and Dracula was told that he was dead. In the course of the novel, Holmes determines that Van Helsing set up various complex deceptions to create the illusion of Dracula