Ashlynn's Adventure Journal is exactly that: An Adventure Journal!

Peer in and read diary entries of Ashlynn's life before the events of the Black Ballad, and admire the accompanying sketches that help bring the text to life.

The Journal then becomes yours to fill as you (or your character) wish! Write campaign notes, sketch out maps or doodle items or characters on the decorated pages.

Just don't let your character see their own sheet. That never ends well.