Just wanted to remind everyone about these! You had to purchase the Kelloggs items between 5/27/19 and 9/30/19... and you have to upload the receipts within 30 days! I went back to my receipts and found enough for 7 books. They have little kids books up to 14+. Last date to upload is 10/30/19!
https://www.kelloggsfamilyrewards.com/en_US/promotions/feeding-reading-national.html