One-Shot. Cover by Max Fiumara (W) Mike Mignola, Scott Allie (A) Max Fiumara Twenty-four years ago, Hellboy took mild-mannered Professor O’Donnell to the secret library of a recently dead necromancer. Since that day, O’Donnell has been the Bureau’s expert on the powerful ancient forces intent on ending the age of man. Find out what O’Donnell saw in this supernatural thrill ride.