From site:
Reading is Fundamental, Inc. prepares and motivates children to read by delivering free books and literacy resources to those children and families who need them most.
Founded in 1966, RIF is the oldest and largest children’s and family nonprofit literacy organization in the United States. RIFs highest priority is reaching underserved children from birth to age 8. Through community volunteers in every state and U.S. territory, RIF provides 4.5 million children with 16 million new, free books and literacy resources each year.
All RIF programs combine three essential elements to foster children’s literacy: reading motivation, family and community involvement, and the excitement of choosing free books to keep.