From Ars Magica
Journal fragments are tomes of lost knowledge scattered about the world, typically found in mage towers, archives, or other Structure Generation. They follow the search for knowledge by mages of long ago, in their research, use, or creation of Ars Magica content. If an entire set (Volumes 1-20) is recovered, its combined knowledge could be used to great beneficial effect.
Their written content can explain uses of certain spells or machines.
Right-Click an Archive Bookshelf with this item to place it in the bookshelf. Only bookshelves that are empty or already contain other parts of the series will accept it. These tomes will not stack upon itself.