Talk:Gameplay:Crew/@comment-24730509-20170112222859/@comment-30827145-20170112223449

It is supposed to be the same. However, the probability is pretty low so if you go 1 at a time, you will get frustrated (around 10% chances of success).

If the books are for a good unit, you should wait for special events (1 week) where you have twice chances of skilling up when feeding books.This kind of events happen more or less once a month. And it was last week.