Here is a short overview of this story: My Naughty Little Sister (who is never ever named) is always doing silly little things.
In this story she is curious about what's in the chimney and when all the soot falls out, she tries to hide it. But when she has measles she is itchy and has to stay in bed, she just is not able to be naughty and cannot do awful things at all. How long before she is bad again?
So you have had the cons (in Part 1), the pros (in Part 2) and a Plot Overview above. Now all that is left to do is choose if you want to get this book for you/ your children/ your grandchildren/ your niece/ nephew/ your friend/ your cousin/ whoever. ENJOY!