Magical Creatures is a 13-book series with 13 released primary works first released in 1819 with contributions by John William Polidori, Luiz Antonio Aguiar, George Chetwynd Griffith, W.B. Yeats, Thomas Crofton Croker, Wirt Sikes, Varla Ventura, Edith Nesbit, Sabine Baring-Gould, Elliot O'Donnell and 4 others.