The first three books in the series focus on Katy - What Katy Did, What Katy Did Next and What Katy Did in School. The books are twee, but they aren't too sugary sweet, which is something I like about many older children's books - sometimes nowadays it can feel as though every children's story has to be sugar coated. Having said that, it does all end rather nicely. It's also an interesting insight into what it might have been like to be a child in America back then. The second two books, Clover and In The Valley High focus more on the second eldest, Clover, but all of the family is involved.
Being aimed at children, the books are simple and easy to read, so perfect for a bit of dip in dip out light reading that won't take you long to finish each book. If you like a bit of a romantic happy ending, then these books are for you too. For a quick, free read, that doesn't require much in the way of brainpower, they're great!