Ok thanks
*SPOILERS WARNING*
If you finish it have have time for more:
* In tol falas ther could be books/notes about the staff of absorption, not named as such though just "a powerful artifact" that the Master is studying, believing it could be used to empower himself
* All over the west there could be short notes that explain the war of the ring, the demise of sauron, the pacification that followed (including some wars with Umbar)
* A story of the creation of the Sunwall & the Gates of Morning (humans crash landed there in the second age, they camefrom Numenor and the elves are some of the Avari that did not go west but instead explored the east), leading to the creation of sun paladins and anorithils and their conflict with the Pride (obviously this is a llong topic is needs to be split in many books/notes/...)
* The arrival of the istari in the east, their notes showing that they grew corupt with time and decided to "abduct" the free orc pride by passing as orcs themselves, abusing the orcs as much as the free people
* many many more ;>