"This volume collects the story 'The mole' from Free Comic Book Day 2008: Hellboy, Hellboy: Darkness calls #1-6, Hellboy: The wild hunt #1-8, and previously unpublished sketches"--T.p. verso.
Hellboy. Volume 5, Darkness calls ; The wild hunt by Michael Mignola. ISBN 9781595828866. Published by Dark Horse Books in 2012. Publication and catalogue information, links to buy online and reader comments.