"A number of the Librarian's skills (marked with an Asterisk (*) above) add a stacking 5% Resolve XP bonus to the entire party. Every time one of these skills is used the bonus XP granted by the Librarian will increase by 5%. This is sadly removed by camping so, when taking along a Librarian, the player has to decide whether they want to benefit from her camping skills or go without sleep for the extra XP."

This is by Intention.