Mount&Blade/Books

Books are purchased from the Book Vendors randomly found in taverns. No other merchants sell them.

In order to learn from books you must have them in your inventory for the entirety of the reading session. On the world map, click the Camp button and choose "Take an action", then choose to "read a book". Select the book from the menu and you will begin digesting the information it contains.

On the world map you can check what book you are reading by clicking on Reports and then Character Report.

These prices are raw data extracted from  using the M&B Item Editor. In practise, merchants will normally charge more for books they sell and pay less for those they buy. Putting points in Trade will bring these amounts closer to the item's true value.