material key to level 2

what material is key to level 2, i have cfa level 2 official curriculum books and the schwester notes, are they enough, do I need to read read cfa level1 official curriculum books or the level2 ones already cover them? Thanks.

level 2 curriculum + Schweser notes + time + hard work => good enough

thanks for the reply

I have not found Schweser Notes as helpful. Several topics have not been touched in them which are required for understanding. I just switched to finquiz curriculum notes. They are structured good.