Thirty books, some the kind you could pick up in your local library, others that are carefully hidden away from the general public for good reasons.
The 'pornography' of the lower classes in Refuge Beneath The Waves
Illusion is the disguise of emptiness
The Elders say there was once a great kingdom here. Yes, in this field of cattle, void of rubble or debris. Now, there are just a few fences and a barn for the bovine herd. At the most, you'll find some fresh dung. No treasures or artifacts of bygone ages here. What fate could have befallen such a place, as to leave no trace? Come closer, and I will show you...
A not-so-subtle means to send PCs on adventures.
Always wary of the minions of the Lying Ones, for they revel in aberrant actions, and seek only to undo your works and subvert your thoughts. - Excerpt from the Samahhi
This scroll contains secrets and conspiricies that would shock the most frequent schemers. Compiled by an order of ‘scholars’ that compiled dirt and furtive information of kings and emperors to use in order to control powerful people. However they eventually paid with the lives of the entire order, but their secrets live on. Secrets that could destroy an empire.
The Egyptian Book of the Dead is a name referring to a set of ancient mortuary spells written on sheets of papyrus. Incidentally, it is also a good example of a campaign defining piece.
They stood on the crest of the rise, three men deep. Their banners, Golden Lions Rampant on a split field of red and blue, fluttering on long poles in the wind. They were silent. By some signal, they all began to rush forward screaming their battle roar. Halberd and blade coming open on the move. The enemy line broke under the power of the Lion’s signature charge.
Major Advarete, Memoirs of the Twin Rose Wars 1320 Greenfield Presses
In Aelfa’s arms, have I left my anvil…
These were the last words of Davyd, the last master alchemist of the Old World, upon his deathbed. For nine centuries many have sought out Aelfa to find the anvil so that they might create weapons of power equivalent to those crafted during the height of the Old World.
You find a patch of edible funghi. They taste well and all, no ill effects. UNLESS you consume some beverage, even 3 (three) days after eating it. Then you become really sick with pains, vomiting, all the fancy stuff. As a gift or good meal, it could be a cruel joke or to make sure the heroes spend their time focused on the mission. And the fine soup you had in the inn yesterday could have some in.
(Inspired through a real-world fungus. Was really used to cure alcoholism.)