He is certainly rare and valuable, so they would want to keep him under lock and key, but I am also sure that so many people would be constantly referencing him that the tendency would be to leave him on a table by the main doors, just to save time.
Il serait un livre rare et précieux, ce qui fait qu'on voudrait le garder sous clé. Mais comme je suis sûre que les gens le consulteraient sans cesse, on aurait tendance à le laisser sur une table, à côté des portes principales, histoire de gagner du temps.