Urmia University Iranian Journal of Language Teaching Research 2322-1291 6 Issue 3 (Special Issue) 2018 10 01 BOOK REVIEW: Input, Interaction, and the Second Language Learner 99 102 120604 10.30466/ijltr.2018.120604 EN Nasser Oroujlou English Department, Payame Nour University Journal Article 2018 09 29 The 2018 edition of 'Input<em>, Interaction, and the Second Language Learner', along with a new preface, </em>explores the roles of input and interaction in second language development and introduces the research studies that have shaped SLA from twenty years ago until now. It refers to diverse theories and surveys the stages that input go through before it can be used productively by language learners. Gass proposes input-interaction model that embraces diverse models in the literature and asserts that all models complement, rather than contradict, each other. https://ijltr.urmia.ac.ir/article_120604_4b942f9885af1b5ef4880152d05b1eeb.pdf