Many settlers players will have by now obtained the manuscript recipe, tome and codex useable in RPH. Many will still be trying. I am lucky to have obtained all three. I currently still use crystals on the evil queen quest to obtain recruitment guide and star coins and have 233/60 map fragments but no inclination to play evil queen quest again.
The observation arises that this is a waste - and the question arises "Why not make the Evil Queen maps/adventures Trade able ?".
This would open up more possibilities for players to obtain the quests and the "book" enablers.