The fight between the vampires and werewolf races had been recorded throughout history. The stories were passed down from Alpha to Alpha, and from Advisor to Advisor.
In the case of the current Lupus clan, they had heard of the history from their own father and the only other person that was extremely well-versed in these matters was Galark.
The current right-hand man of Lupus. A certain individual in the pack would usually be appointed as the bookkeeper of the group. This individual's duty was to pass on all of the knowledge of the werewolves.
From the rituals, to enforcing the pack rules, and explaining how an Alpha bite among other things worked. These things weren’t just written down in books, because it was the duty of the bookkeeper.
The bookkeeper would also do two things. One, they would pass on all of their knowledge to an apprentice, that way the knowledge would continue to live on.