The nine books of the English Roundup series are very useful for students of English as a foreign language. First, they introduce many technical terms and common idioms and expressions in several areas of discourse, ranging from science and technology to the arts, from sports and leisure time activities to medlicine and problems of health and aging. Second, they put these words and expressions to work in everyday conversational situations and give the student substitution drills by which he or she can practice them together with the appropriate sentence patterns. I highly recommend these books to anyone who really wants to improve his or her English.