This quest is not available in game.
Speak with Rabine Saturna in the village of Nighthaven, Moonglade.
Anyway, you should check back with me relatively soon... that is if you want to know what was in here. As soon as I find out what it is, and if it's indeed a book, I'd be happy to share that information with you.
In the meantime, I'd check in with the den mother of this little bear camp, Rabine. No doubt he'll want to know what crazy antics you've been up to. Never leave the den mother waiting, <name>... that is, unless you want to be doused in honey.
It's happened, trust me.