Anne_Rice could write about any topic or subject, but it seems that she had to keep writing about the Vampires.
http://annerice.com/Bookshelf-VampireChronicles.html
https://en.wikipedia.org/wiki/Anne_Rice#Interview_with_the_Vampire
https://en.wikipedia.org/wiki/Anne_Rice#The_Vampire_Chronicles
http://annerice.com/Bookshelf-AllBooksInOrder.html#NewVampires
