Usagi Yojimbo Book 26: Traitors of the Earth is out today in both trade paperback and limited edition hardcover. It has a wonderful introduction and Usagi drawing by Walter Simonson. One of the things I take pride in, is the caliber of creators that have supplied introductions for my books--Will Eisner, Stan Lee, Sergio Aragones, Lynn Johnston, Alejandro Jodorowsky, John Landis, Jack Davis, and so many others.

I believe all the volumes are in print.