I think they both cover it at some point but look at the cd's etc on the front page of this site it states what they cover, conditional formatting formulas are the same as any others its just working out what you want the conditions to be and in what order to place them, try playing with it also I have found looking at boards such as these can be very instructive if you see a question then come back an hour later having worked it out to see that someone did it in 3 seconds can be quite amusing but also extremely rewarding if you have the same formula as them.....very rare in my case,
but I do find real live problems more motivating to learn than just trying to watch youtube, I often found I was copying what was going on and not understanding a thing.