The Bestiary aka Encyclopaedia of Mythical Creatures
The Bestiary is first mentioned in 2×04 ‘Abomination‘ where Dr. Deaton tells Scott that the Argents would have something describing all the creatures they have come across.
“This is the crucial part they will have some kind of record or book it will have descriptions, histories, notations of all the things that they have discovered.”
It is also mentioned by Stiles that the Bestiary is like an “Encyclopaedia of Mythical Creatures”. Within the same episode Scott and Stiles manage to steal a copy of the Bestiary which is kept in digital form on a memory stick. They can’t read it though because in the words of Stiles “is that even a language?”
In 2×05 ‘Venomous’ Allison takes the pages of the Bestiary to Ms. Morrell, the school guidance counsellor, to be translated (I don’t know why she is an expert or if it has anything to do with the fact she’s French). The language is ‘archaic’ and Ms. Morrell doesn’t think she can do it but at Allison’s insistence she translates:
“Like the wolf, its power is greatest at the moon’s peak. Like the wolf, the Kanima is a social creature but where the wolf seeks a pack the Kanima seeks a friend.”
However in 2×06 ‘Frenemy‘ at the end of the episode Lydia who happens to know archaic Latin because she got bored with classical Latin (archaic Latin is that which was spoken pre 75BC) translates, for Allison, all of the pages (there are five of them) in the Bestiary on the Kanima. She translates the following:
“…the Kanima seeks a master.”
In 2×07 ‘Restraint‘ we see more of the translated text of the Bestiary on a tablet throughout the episode.
“Like the wolf, its power is greatest at the moon’s peak. Like the wolf, the Kanima is a social creature but where the wolf seeks a pack the Kanima seeks a master. The Kanima, a weapon of vengeance, is used to carry out the bidding of its master. The Kanima was once used by a South American priest who took it upon himself to rid his village of all murderers. The bond between master and servant grew stronger until the will of the master became that of the Kanima’s and whomever the priest deemed unworthy, the Kanima served his vengeance. The Kanima is a mutation of the werewolf gene that cannot fully transform until it resolves that in its past which manifest it.”
It should be noted that the Hales have a Bestiary of their own currently located on Peter Hale’s computer. Read about it here.