Bringing the paranormal genre on the map, Stephenie Meyer's Twilight Saga was an incredible hit with an equally incredibly wide audience. While the main series is four books that were released over three years, it spawned several spinoff books and other series inspired by the concept of vampire-human romance. 

Picture attached shows the four main books of the series, as well as two spinoff books released by the author released in 2010 and 2020.