Appearance in Castlevania: Harmony of Dissonance
The bolt book can be found in Castle A at the Clock Tower in the metal ball race room. Unlike Castle B the race will be alot harder, there will be spikes, Bone Pillars in stacks of 4, wooden platforms to drop down instead of falling, and Arabaki. The best way to get ahead of the metal ball would be to slide, it kills the Arabaki quick and easy and covers more distance than walking, dashing works too but sliding eliminates the Arabaki easier than stopping to use the whip. If you fail to beat the ball, exit the room and try again.