Words for Students is a 7 volume series at a price of $20.95 each volume. It is designed for use as a core text in vocabulary classes, as a supplemental text in reading, speaking, or writing classes or may be used for individual study. Each volume consists of twenty-five units that present base words with definitions, examples and exercises. ISBN's: Volume 2 text 0472082124, Volume 3 text 04720823132, Volume 4 text 0472082140, Volume 5 text 0472082159, Volume 6 text 0472082167, Volume 7 text 0472082175. Cassette Price $15.00 each: Please select from the following ISBN numbers if you need a cassette to accompany the text: Volume 1 tape 0472002414, Volume 2 tape 0472002422, Volume 3 tape 0472002420, Volume 4 tape 0472002449, Volume 5 tape 0472002457, Volume 6 tape 0472002465, and Volume 7 tape 0472002473. Price $15 a cassette.