Apparently, it seems, that quality children's nonfiction is becoming more and more difficult to find. This problem seems most exacerbated when looking for science books in the middles school age range. I'm not sure why, but my ability to search for nonfiction books for specific topics is extremely limited in that only a few are new and can be purchased as such, with the remainder becoming out of print and only offered as used. These latter used books are then often few in num