In the first Divinity - if you researched enough volumes in the Merchant's Guild archives, you'd get a point in the Trader's Tongue skill.
It would be cool if there are some in-game rewards when collecting and reading books... for example, when you collect and "read" creature books we'll gain bonus (armor, damage, resistance etc) when we face that creature... stuff like that
Yes, or something similar to The Witcher, where you had to find books about creatures in order to collect parts from them and to find out their resistances and weaknesses.
