"OUR CHANGING WORLD," THE FOURTH BOOK IN THE "ENGLISH FOR TODAY" SERIES, CONTAINS 20 READINGS DEALING PRIMARILY WITH SCIENTIFIC DEVELOPMENTS IN THE SPACE AGE. DESIGNED FOR UPPER-INTERMEDIATE STUDENTS ON SECONDARY SCHOOL LEVEL, THE TOPICS RANGE FROM JET PLANES AND ROCKETS, SATELLITES AND NUCLEAR SUBMARINES TO COMPUTERS, SUPERMARKETS, AND MIRACLE DRUGS. WHILE THE EARLIER BOOKS OF THIS SERIES EMPHASIZE CONTROL OF A LIMITED SET OF SENTENCE PATTERNS AND A RESTRICTED VOCABULARY, BOOK FOUR ATTEMPTS TO DEVELOP GREATER FLUENCY IN CONVERSATION AND COMPOSITION. THIS TEXT MAY ALSO BE USED AS A READER AND A GRAMMAR REVIEW INDEPENDENTLY OF THE SERIES. THIS VOLUME, PUBLISHED BY MCGRAW-HILL BOOK COMPANY, 330 WEST 42ND STREET, NEW YORK, NEW YORK 10036, IS AVAILABLE FOR $1.48, TEACHER'S EDITION, $2.95, ACCOMPANYING WORKBOOK, $0.66. (AMM)