I’ve been experiencing a similar issue with not getting credit for books toward the Event, however for me it doesn’t seem to matter how many books are collected. I’m stuck at 25 (of 30) books, even though three Scripts have been taken to the Raptor multiple times. I’m curious how many people have this issue, or have hit 30 books yet.
So far I’ve gotten credit for bringing back 2+2 scrips in different missions.
I think the bug isn’t that books aren’t counting, it’s the bug that predates the recent update where progress for melk contracts and special events isn’t updating when you go back to the mourningstar. It only updates the tracker if you log out and then back in, or you go on a mission and return to the lobby a second time.
In case you haven’t tested it. The event only counts grims and scriptures collected in maps with the special event modifier.
Collecting books in non-event maps without the modifer doesn’t progress your count.