I had a harder time with Karen Andreola's and Catherine Levinson's books. Andreola's has a lot of great ideas, but I found getting through her book harder than reading Charlotte herself but I think that is mostly me, because most people seem to find it very helpful. I do think she adds in a lot of her own thoughts so it is not solely CM (I should add I don't attempt to do school completely CM style, but just putting that out there
).
The thing that helped most for me is to read Volume 1 of Home Education by CM. You can read it free on AO.
Children who Love to Learn is also very good. It spelled out a couple of things for me that I didn't get fully before-- how to do narrations, how to do picture study, and what it really looks like.