Bonus (Glossary)

This is a modifier in favor of the character in question.  It is marked with a + sign, but is not necessarily actually something you add.  You have to interpret the Bonus to be an action favorable to the character.  For example, Pick Pocket gives you a Bonus to your Luck roll.  However, some of the descriptions of abilities and skills (notably in the Class description sections of the various Course Catalogs) can be a little confusing.  The + sign simply represents a Bonus as outlined here.