If I understand correctly, all skills will be removed (set to zero) and the skill points refunded (is that true? If I am 4th job does that mean for all jobs or only 4th?)

So, I will then have my skill points to redistribute again (and I won't be putting much in blizzard this time). Do I need to get new skill books again?

This just occurred to me. If so, I had better get to the FM and stock up before prices sky-rocket.