Getting cancelled should end a bunch of magical effects:

• Invisibility (temporary or otherwise)
• Temporary speed
• Temporary monster detection
• Temporary protection from the spell

New artifact spellbook Akashic Records:

• Read for enlightenment.
• Can be applied like a stethoscope to probe adjacent enemies, doesn’t cost a turn.
• When carried, gives extrinsic monster detection. Farlooking reveals enemy HP.
• Invoke for precognition: for the next 100 turns, your attacks never miss, and enemies roll twice against you and use the lower result.
• If you would be killed from HP damage from an attack during precognition, you will dodge the killing blow and all subsequent attacks on that round. Immediately ends the effect.
• Might mesh well with the other encyclopedia idea, using it as a base item type.