Extensive reading (or free reading, book flood, reading for pleasure), is a way of language learning, including foreign language learning, through large amounts of reading. As well as facilitating acquisition and learning of vocabulary, it is believed to increase motivation through positive affective benefits. Proponents such as Krashen (1989) claim that reading alone will increase encounters with unknown words, bringing learning opportunities by inferencing. The learner's encounters with unknown words in specific contexts will allow the learner to infer and thus learn those words' meanings.