El cementerio de los libros olvidados is a 8-book series with 4 primary works first released in 2001 with contributions by Carlos Ruiz Zafón, كارلوس زافون, and 3 others.
2001 • 9 Readers • 439 pages • 4
2008 • 74 Readers • 544 pages • 3.9
2020 • 15 Readers • 162 pages • 4