During test it was stated that bosses you can only fight once are not extractable. However I have come across proof that several school spell and main line quest non-repeatable creatures (not just bosses) are being registered in the tome.
Is this correct or is it a bug that will be fixed?
Also, as an fyi, midnight sun pagoda creatures are listed under Khyrsalsis, would it not make more sense that why were mooshu, or better yet have gauntlets have their own tab?