How to complete the Four Fierce Axes quest in Phantom Blade Zero

Completing the Phantom Blade Zero Four Fierce Axes quest takes a long time as it requires you to reach the game's fourth region before it concludes. However, the bulk of the work is a hunt for book pages around Weeping Creek Valley, and you can't find all but one in your first few hours of playing. That last one is a right pain to get as it's locked off in an area of the valley you can only reach after getting to a completely different region of the game. So, if you're stuck at any point of the