On the one hand, it’s about a little-known (at least I had never heard of her before) woman in science, from an era when few women were encouraged to pursue such things.  Our kids need to know more about such folks.  I could wish it was better done, though.  It is illustrated with photos from the time (yay, primary sources), but they don’t necessarily do much to support the text.  Because it is written for small children, the text itself is a bit dry, though clear and understandable.  Pet peeve:  it tries to construct a timeline of her life as it goes, but it pays no attention to the spacing along the line as representative of time (there’s more space between the markers separated by one year than there is between those separated by 24 years).