Game description from the publisher:

Take the Pathfinder Adventure Card Game to the next level with the Pathfinder Adventure Card Game: Rise of the Runelords - Character Add-On Deck. Inside this 110-card expansion deck you'll find four new classes for your Pathfinder Adventure Card Game characters – Amiri the barbarian, Lini the druid, Sajan the monk, and Seelah the paladin — along with all the additional cards you need to expand your adventures to accommodate five or six players. New monsters, weapons, and equipment, as well as additional copies of some of the game's most useful spells, blessings, allies, and more give you everything you need the face even the deadliest threats.

Errata: Early printings had the "Role card" of each character listed as belonging to "B" (for Base Set). This has been fixed in later printings to instead say "C" (for Character Add-On Deck).