Book giveaway programs provide free books to families with infants to encourage caregivers to begin reading to their children during infancy. This meta-analysis of 44 studies retrieved from 43 articles tests the effects of three major book giveaway programs: Bookstart (n = 11), Reach Out and Read (n = 18), and Imagination Library (n = 15). Effect sizes were aggregated within two domains--home literacy environment and literacy-related behavior and skills--before being averaged across studies. The findings corroborate the assumption that book giveaway programs promote children's home literacy environment (d = 0.31, 95% CI [0.23, 0.38], k = 30), which subsequently results in more interest in reading and children scoring higher on measures of literacy-related skills prior to and during the early years of school (d = 0.29, 95% CI [0.23, 0.35], k = 23).