From the publisher's website:

As the head of a medieval monastery, your goal is to assemble the greatest book collection and build the most famous library. To that end, you need to acquire the necessary pigments for decorative lettering, hire the best copyists and reproduce the most precious works. But you have only a limited amount of gold at your disposal to reach your goal. The trick is to part with the items in your collection at just the right time and to pay the lowest price for the works for which others will envy you. Finally, you must watch out for the bishops, who can ruin your plans on a whim! In Biblios, victory points are obtained by being ahead in one or more of the following categories: monks, pigments, holy books, manuscripts and forbidden tomes.