Pyromancy tome from the Great Swamp containing advanced pyromancies.
Give to the old master pyromancer to learn advanced pyromancies of the Great Swamp.
Spells of the Great Swamp are passed down from master to pupil. Without a master, there is no pupil, but without a pupil, there is also no master.
Found on the Road of Sacrifices. From the Halfway Fortress bonfire, proceed down the path, drop down the ledge near the lake. Look for a Great Crab near a wall, the tome can be found in the deep water that surrounds the giant tree next to the Great Crab.