I'm tapped out. I've just gone through the map for another hour. In the very likely event someone smarter than me is reading this. This is what we know and this is what we need.
The Map of Fairyland
-We don't know for certain where the chicken made landfall. We can't seem to figure out who the 'man on the shore pointing the way' was or where they are pointing. For a while I was thinking the man was someone she met before she entered the water. But upon rereading the clue maybe it's someone she met while she was swimming. The only clear person I see on a 'shore' is a shapeless kinda blob on never never land. No idea where they are looking.
-We don't know why the volume 1 journal has the symbol for psyche on it. Psyche is on the map, but is that important?
-We don't know what “Dark water writhes, less reptile than Castor?” means. Castor seems to refer to the son of Zeus and Leda who was born from an egg. What the heck does 'less reptile than Castor' even mean? And what dark waters? Heck, we don't even know why it's phrased like a question, or why all the words in it aren't capitalized like all the other lines.
-We don't know what the numbers 26.49757 or 168.327325 mean. Maybe they're lat and long? Are they lat and long of our world...or supposed to be positions on the map? Or are they nothing of the sort?
-We DO know what “Six Keys Surround Another.” means. It refers to the 6 key symbols on the map that surround the Dwarven Caves. So the caves, or the dwarves are a 'key'. We have no idea what significance this is. There are actually 8 dwarves on the map. Is that important?
-We don't know what “Millenary Outstretched Arms Reveal Sadko’s Temptation. Look Above CC.” means. Is that C.C. as in the abbreviation for a name? Does it mean C's, or seas? maybe? Look above the seas? What does a thousand outstretched arms mean, and what is Sadko's Temptaion? Gold, pearls, mermaids, adventure?
-We don't know what “Heart. Bone. Pig. Spider. Vinegar. Sheep. ???” means. I assume the point of this is to tell us to figure out what they 7th item in the list is. Are those first 6 items places on the map? Are they references? Are they synonyms?
At this point we are so in the weeds I'm not even sure there's any point to asking the Book for a clue. It'd just be stacking more obscurity onto the existing obscurity.
However, if it does come to that @Piki or @Leigha I believe you have the words. Are either or both of you thinking the time might be coming to use one?