Umbra 2nd / revised edition. Sourcebook for Werewolf the Apocalypse (White Wolf, 2001). Softcover, good condition spine good too – photo to be added.
For more info on this edition of Umbra see Unofficial WW wiki
General info on Umbra from Werewolf p.o.v. – Garoumush Fandom: A Simple intro. to the Umbra