Signed and numbered hardcover edition with 16 extra pages of illustrations.
From the dustjacket:
Echoes: The Drawings of Michael Wm. Kaluta spans the career of one of the most adventurous fantasy artists of our time. From Robert E. Howard's Hyborian age through the noir era of Darkman and The Shadow to the delightfully retro sci-fi worlds of Starstruck and Metropolis, Echoes reveals hundreds of classic, rare, and previously-unpublished works. Commentary by Kaluta and Paul Chadwick.
The special hardcover edition has 16 extra pages of illustrations.