Harvest 25 Ripe Ghost Trees

Fully investigate 2 Tall Bookshelves
Rewards:

Notes: Ghost Trees are a mission reward and free gift. Library Ladders are a Direct Request. Bookshelves are healed with 10 Dustin' Brushes which are crafted.
Each Brush requires 2 Ghost Huntin' Tools (Winter Cherry Lantern) and 3 Feather Brushes (Wall Post)