Atma -> Animus. the last book

[Alx789]

I competed all 9 books of atma and already got new animus bow. First 8 books disappeared just after completeon but th last one still stays in the inventory key items. Al duties there ar red-crossed.
It's for memory or may be used?

[The_Last_Dragoon]

Whenever you pick up a new book, it automatically discards the old one, you can safely discard them manually as long as you've filled out all of the marks on it.

[Asakura93]

You can discard it, I believe. It's finished, and you won't/don't need it anymore.

EDIT: Check if you finished it though, before discarding, whenever you do a new Animus weapon.

[Alx789]

I have already exchaned atma bow to animus one.
Previous books disappeared immediately after completeon- before i jumped to mordona to get new one. I know it exactly because i placed book's icon on screen ang after completion got a message u don't have this item. 9th one hadn't disappeared and still clickable 8)

[Maero]

That is correct your final book always remains in your inventory for some reason until you disguard it, give it to a retainer or start a atma book on another class. Fairly certain it is safe to toss it out

[Bixby]

You can also use the book disposal option at the NPC you buy them from. Which is pretty much just discarding it with some flavor text thrown in.