My DD7 finished HP before she turned 7. She read Percy Jackson series and was bored after that and turned to HP. She was not too keen on reading classics like a tale of 2 cities, etc...

She was not intimidated by all those scary scenario (I was afraid of that in book 5 and 6). Recommended does not mean that you have to but if your DD's school has AR (accelerated reading) program, those HP books will earn plenty of AR point :-)

Your DD may start with Percy Jackson series which is a great read as well.