Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Enhanced Edition What to do with all these books?

Hi, most of my characters are really weighed-down by the large amount of books they are all carting about with them and I'm not sure whether it's ok to ditch some or all of them to free up the space and weight. Is there a way of knowing which (if any) I need to carry about with me?
Cheers