Regarding Books
Perhaps the most important thing to keep in mind regarding books is that they are rare and precious.
Books materials are expensive, copying a book accurately takes a lot of effort, books are easily damaged, and just keeping a library of a few dozen books in good condition requires a dedicated librarian. Furthermore people who own books are quite aware that their value, and the money and prestige they bring, depends on their rarity. Permission to copy one will come with a steep price.
This is as true for mundane books as it is for arcane ones.
The second thing to remember is that High Level, High Quality books are extremely rare and incredibly precious
To write such a book, you need an author with exceptional communication skills who has mastered the book's subject to an exceptional degree and has taken the time to write a book about it. At which point there is exactly one copy of the book in existence, and whoever has it has every incentive not to allow further copies to be made.
So no, L5Q10 summae are not easy to find. For most Abilities, they don't even exist. Even when they exist, there are probably only a handful of copies in existence in Mythic Europe, if that many, and no one keeps a register of who has what.
House Rules and clarification:
1) We will not use the 'Extended Suggestions on the Quality of Books' from Covenants. This is not a campaign about magi who stay at home to write books, or founding a covenant dedicated to rivaling the Great Library of Durenmar, so there is really no need. I have no objection if a player wants to write a book because he happens to be good at it and it makes a good bargaining chip, but that book should be thought of as a means to an end, not an end in itself. The scribing and binding and illuminating are just minor details that will take care of themselves, one way or another - just take your automatic bonus from the Core book :)
1 bis) I will make an exception for Resonances, should the players acquire suitable materials through stories (not bargaining). Although, really, the odds of acquiring just the right resonant materials for the book one of the player was just writing (or copying) is quite low. But they'd make excellent bargaining chips with covenants with great libraries.
2) We will use the rules for Translations in Art & Academe, p.87, should the necessity arise (and it probably will). To summarize: to translate a text without loss of quality, the translator needs a score of 6 in both languages involved and a score of 3 in an Area Lore from a culture where the language to be translated is the main spoken language (or was, for Dead Languages). An exception is made for books on Hermetic Arts, which only need 5 in both language and no special Lore. Obviously the translator needs to be able to read and write the relevant languages, and the minimum scores required to copy books on supernatural subjects (AM5 p.166) also apply to translating them.
3.1) The Roots of the Arts are a series of L5Q15+ summae on the Hermetic Arts. There are several in existence for each Art (really, most decent specialists can write one in their specialty, and there is quite a bit of prestige attached), and permission to copy them is routinely granted for free (although incidental fees might still apply).
3.2) The Branches of the Arts are a jealously guarded series of High Level, High Quality summae on the Hermetic Arts. Theoretically, each Branch is the best book in its Art, but as that is often a difficult judgement to make since they are too jealously guarded to allow for side-by-side comparison, there are often several books whose owners claim that title for the prestige attached in owning one. And the less certain the owner is that his book truly deserves the title, the more jealously he guards access to it lest someone proves him wrong. Permission to study them requires making the right friends and/or massive bribes. Permission to copy them... I did mention the jealously guarded bit, right ? And no one would entrust a copy to a reckless magus who is off to the frontier and beyond.
Examples of Branches of the Arts include De Lapii (L17Q14), by Jermias filus Guernicus; Ars Flambonus (L14Q12), by Elaine filia Flambeau; and Mirrors of the Soul (L12Q16), by Perpauca Bonisagi.
3.3) This is not so much an invitation for the players to buy such books at character creation (although they can) as an indication of what to aim for if they wish to do better :)
4) There is no book on Parma Magica. No summa, no tractatus. Or if there is, no one is admitting to it. Writing or owning such a book is forbidden by the Order.
This message was last edited by the GM at 20:13, Wed 30 Jan 2019.