Mixed fiction and non fiction. I have approx 100 of these books. Readers intro to science, etc. Very small in thickness, some are marked with grade level. Some have a small sticker. If you want some of these message me and you can pic what kind you want. For boys or girls, math, science, etc... 1 pound of books is approx 10 maybe more maybe less. Can sort into "girl" or "boy" bundles