twitch: https://www.twitch.tv/biohacktv
This is a short guide showing you how to use the bookshelf item in order to easily obtain knowledge.
Bookshelves can be purchased on the cash shop for 300 pearls and despite the description can be used an unlimited amount of times.
To use the bookshelf interact with it on an alt character. Reading takes 1 hour and all your characters can read at the same time. You cannot change channels while reading.
Correspondence with support: http://imgur.com/a/Yvlho
Black Desert Online: How to easily obtain knowledge and energy with the bookshelf item!