This is one of the Artist's Proofs sold by Stan directly to his fans at conventions.
"This is number 35AP of 500 copies of the hardcover edition ... each of which has been individually signed, numbered, and illustrated by Stan Sakai." It has a bound-in limitation page with an exclusive color illustration and Stan has drawn Space Usagi with his sword drawn. This hardcover features a different cover illustration than the softcover.
Out of print.
From the publisher:
Unimaginable future technology alongside an ancient samurai code. A universe populated with bizarre lifeforms divided into warring clans. Space Usagi is the descendent of the 17th-century samurai, Miyamoto Usagi, and is the hero of his clan. Space Usagi collects all three miniseries previously published by Dark Horse and Mirage. Death and Honor tells of the fall of the Shiroshi star sytem, White Star Rising chronicles a band of samurai as they attempt to retake their system, and Warrior has Usagi on the trail of the abductor of his lord. Also featured are two short stories, including an encounter with the original Usagi Yojimbo.