From the publisher:

Mike Mignola’s Hellboy Into the Silent Sea is a glorious treatment showcasing Gary Gianni’s original artwork in an exquisite book. This collection includes revealing commentary regarding how two legendary comic-book creators seamlessly developed this Hellboy sea saga from the core of an idea into a finished work of art. The combined talents of Mignola and Gianni are on display as the reader follows along the path of the creative process: The script, preliminary roughs, reference photos, completed pencil drawings and finished inks are all shared and discussed. The pencil drawings provide insight not only for the student but also for any fan who enjoys lavishly reproduced comic art. Gianni’s commentary and preliminary pages are intertwined to provide an light-hearted look into the creation of a comic story.