It can be wielded in the off-hand slot and has a right-click ability activated by selecting the "Unleash" right click option. When activated, fiery domes will spin around the player, immediately igniting any log the player walks/runs over. Doing this will give the player double the Firemaking experience they would normally get when lighting logs and lasts for around 2 to 3 minutes (or until unequipped). This effect does not stack with any other firemaking experience boost such as Bonus experience, Flame gloves, or Ring of fire. The ability can only be used once per day, and recharges at midnight UTC. When you try to Unleash the book again before it has regained its power, the following message appears: "The book is still recharging power."