Barbara Park knew how to capture the funny, innocent, social awkwardness of being young. Junie B is every parent's nightmare. She is not a naughty child. She is simply learning how to navigate in a big world full of unwritten rules about what a young child should and shouldn't say and do. The story is simple and well written. The vocabulary is great for an early reader.
I have to admit I am not fond of Junie's tart little sayings at times. I do not allow my kids to use words like "stupid" which are thrown around liberally in the book. I have made clear to my kids they can read Junie B, but if I ever hear Junie B-ish words coming from their mouths, Junie B will find herself at the half price bookstore on the corner.