Fauna of the Northern Realms, Volume 1

Reading this book provides the bestiary entry for wolves. It can be purchased from the following merchants:
 * Marcus T.K. Hodgson
 * Helmut Altberg, the merchant by the rugs in Hierarch Square
 * Halfling merchant, depending on Geralt's choices in Hey, You Wanna Look at my Stuff?

Journal entry

 * What a wolf is, every man knows. Who hasn't heard them howling at nights or seen their tracks in the snow come morning? Who hasn't felt a cold chill run down his spine when he catches sight of a pack of five of [sic] twenty of them hunting in the woods?


 * These beautiful animals are treated by men as enemies – and not without reason, for they attack our flocks and will even kill our horses during times of deep frost. Yet they are noble beasts, endowed with great intelligence and displaying a strength and independence that no man can help but admire.

Fauna der Nördlichen Reiche, Band 1 Faune des royaumes du Nord, volume I Fauna dei Regni Settentrionali, Volume 1 Fauna Północy, tom 1