Find out in this guide how to read books in The Witcher 2: Assassins of Kings, if you are still interested in this question, then read on.
The Witcher 2: Assassins of Kings takes place shortly after the events of The Witcher. Geralt has essentially been called in as King Foltest's personal bodyguard, and the king engages troops loyal to his mistress, Baroness Marie Louise La Valette, after what can be described as a love spat. That's how to read books.
How to read books in The Witcher 2: Assassins of Kings?
You can't test it specifically. However, since the books don't weigh anything, keep them in your inventory after you buy them and don't sell them back. If you come across the same book in another store, it will be marked with a black check mark on the book icon on the right side of the screen where you can view the store's products. Just make sure you read the books you buy and then you won't have too many problems with it.
It's definitely a step back from The Witcher 1, where you could tell if you've read the book or not by the text underneath the book in the shop's inventory that says "You've already read this."
This is everything you need to know about how to read books in The Witcher 2: Assassins of Kings.