I think that type of "5th grade" level book is much easier than say reading a Harry Potter because of the way it is formatted( large print, white space and cartoons). I have learned to understand it is pretty rare- I did not realize it originally because it was all I knew!!! When they make the jump to the big novels is when I noticed the bigger shift. He took off reading at a completely different pace and level and really separated himself from his peers. So get ready! In fact friends would walk up to him with a " thick" book and say you will like this one- without even knowing the subject just because it was " thick" So you should love that your child is reading at that level and learn to love the library because I spend way too much money at half price books!!!!!