Lovecraftian monsters ravage an apocalyptic Earth as the B.P.R.D. fights to save what little of humanity they can. But even Hellboy is not who he once was, and whether anyone survives Varvara and the long-awaited Ragna Rok remains to be seen. Written by Mike Mignola and Scott Allie and brilliantly rendered by artists Laurence Campbell, Sebastián Fiumara, Christopher Mitten, and Mignola himself, this this omnibus is a must have! Collects B.P.R.D.: The Devil You Know: Messiah, Pandemonium, and Ragna Rok.