Since it's a picture book, my first impression was that this book was for little kids, but it contains fascinating scientific information that will interest older ones. It certainly was interesting to me, and I'm a grown up. The amusing rhymes on each page will entertain kids of all ages, though the younger ones probably won't understand the vocabulary. The fascinating factoids are definitely for the older set and the book is intended for eight to thirteen year olds.
The illustrations are by the talented Eugene Ruble who also did the artwork for my soon-to-be-released book, Secret Service Saint and many others. Ruble does an excellent job of drawing the skeletal parts accurately while keeping the pictures amusing.
No Bones About It will be helpful to young students for educational purposes, but it's also just plain fun.
I expect the other books in the series will be equally enjoyable.