If another mod forces a use of the book of secrets, it will use the vanilla effect instead of this modded one.
The downside is that if you trigger it through Metronome, it'll use the vanilla effect instead -- but that's still a good tradeoff.

Added EID compatability

Removed passive blue map effect; added individual room reveals when too far from target. Now also includes ultra secret rooms!

Opening Red Rooms no longer completely changes the location of the room with the secret in it.

Initial upload