You must use the secondary action key (default 'F' on PC) to place the book open on a surface. Tossing it with 'G' (drop) leaves it closed, and the ghost cannot write in a closed book.
After the ghost writes in the book, take a photo of it for extra rewards in your journal. Fazmofobi
As of the latest updates, there are three tiers of the Ghost Writing Book: Interaction Rate Parchment Notepad Old school, slow, and basic. II Heavy Grimoire Better range and more frequent interactions. III Ornate Diary You must use the secondary action key (default
You can hear a distinct scratching sound when a ghost is writing, even from another room. even from another room.