Vivian James Cook (born 13 June 1940) is Emeritus Professor of Applied Linguistics at Newcastle University in the United Kingdom. He is renowned for his work on second-language acquisition and second-language teaching, and for writing successful textbooks and popular books about linguistics. He has worked on a number of topics such as bilingualism, EFL (English as a foreign language), first-language acquisition, second-language teaching, linguistics, and the English writing system. He has published more than 20 books and 100 papers. He was founder and first President of the European Second Language Association (EuroSLA), and co-founder of the Oxford University Press journal Writing Systems Research.