Classroom Lot of 30 Houghton Mifflin Reader's Library Grade 3 Books Homeschool. This lot includes 30 books five books each of six different themes. Third grade level 8 to 9 years old. Books are in very good to excellent condition. Books come in storage box with dividers. The box is a little compromised. See pictures. All books have a label on the inside cover, see picture. This is an excellent classroom lot or great for teaching kids in a home school setting. All sales final. Thank you for your interest. All books come from a smoke free home.