I get the feeling books are a bit borked.
I bought several masterful works that concern values.
For instance, I have a masterwork that concerns the value of knowledge. I do not have books that concern the worthlessness of knowledge, nor do I have books that concern the nuances of knowledge.
Yet, My entire population now has 'thinks that the pursuit of knowledge is a delusional fantasy' in their prefs.
Or, I have 2 books that concern the value of craftmanship, and another one that concerns the value of hard work.
Yet, all my dwarves now have the 'doesn't particularily care about craftsdwarfship' and 'doesn't really see the point of working hard' prefs.
I think books are borked, and they produce the exact opposite effect of what they should.
EDIT: in other news, I just appointed my only goblin as the hammerer. Let's see what a little cruelty can do with an -adamantine warhammer-
EDIT2: FINALLY!. Captured a fourth GCS. Now I can start breeding them, because for some reason the wild ones refused to breed. Now I can make the trained ones make more trained ones that I can either tame, or let revert to wild if my original wild ones die.
EDIT3: Speaking of breeding. Dear 6 breeding pairs of dwarves. Why are 90% of all your children female? How am I supposed to continue your bloodlines like that?
EDIT4: Cool, there's a new dance in town. Apparently it's a dance without music or song, there's no one playing instruments or singing. Hmm, description says it should have 2 singers.