Would it be possible to add a brief sentence in the Bestiary section of the Adventure Path which new monsters (with page numbers) that have been detailed in the adventure part of the product (but not in the Bestiary part of the product or in another Pathfinder product)?
As an example: For "The Infernal Syndrome", the sentence could read:
It would make it a little easier to find that monster that you remember you saw in one of the adventures, but you don't remember exactly which one, without having to leaf through all of the adventures to find it.