Continuity mistake: When Abe is being tortured by the Harpies, at one point, you can see that his body is covered with cuts and his blue-colored blood. The blood then disappears and reappears in subsequent shots.
Hellboy Animated: Blood and Iron (2007)
1 continuity mistake
Directed by: Tad Stones, Victor Cook
Starring: John Hurt, Ron Perlman, Selma Blair, Doug Jones
Continuity mistake: When Abe is being tortured by the Harpies, at one point, you can see that his body is covered with cuts and his blue-colored blood. The blood then disappears and reappears in subsequent shots.
Trivia: A post-credit sequence in this film hints at a third "Hellboy: Animated" film that would feature a popular character from the comics named "Lobster Johnson." However, the studios were not pleased with the DVD sales for the first two "Hellboy Animated" films, and all production on the third has been put on hold.
More questions & answers from Hellboy Animated: Blood and Iron
Answer: 90% of the creatures in Hellboy are taken from various myths and legends. Any books dealing with mythology or medieval stories should be ideal.