24 books in series

B.P.R.D.

B.P.R.D. is a 24-book series with 24 released primary works first released in 2003 with contributions by Mike Mignola, John Arcudi, Joshua Dysart, Guy Davis, Dave Stewart, Scott Allie, Fábio Moon, and Gabriel Bá.

B.P.R.D., Vol. 1: Hollow Earth And Other Stories
B.P.R.D., Vol. 2: The Soul of Venice & Other Stories
B.P.R.D., Vol. 3: Plague of Frogs
B.P.R.D., Vol. 4: The Dead
B.P.R.D., Vol. 5: The Black Flame
B.P.R.D., Vol. 6: The Universal Machine
B.P.R.D., Vol. 7: Garden of Souls
B.P.R.D., Vol. 8: Killing Ground
B.P.R.D., Vol. 9: 1946
B.P.R.D., Vol. 10: The Warning
B.P.R.D., Vol. 11: The Black Goddess
B.P.R.D., Vol. 12: War on Frogs
B.P.R.D., Vol. 13: 1947
B.P.R.D., Vol. 14: King of Fear
B.P.R.D.: Vampire
B.P.R.D.: Plague of Frogs, Volume 1
B.P.R.D.: The Devil You Know, Vol. 2: Pandemonium
B.P.R.D.: The Devil You Know, Vol. 3: Ragna Rok
B.P.R.D. The Devil You Know Omnibus
B.P.R.D. Hell On Earth, Vol. 1: New Earth
B.P.R.D. Hell on Earth, Vol. 2: Gods and Monsters
B.P.R.D.: Being Human
B.P.R.D. Hell on Earth, Vol. 13: End of Days
B.P.R.D.: 1948