PHAM, M. T. N. BOOK REVIEW: Halma, R. & Oplinger, C. S. (2001). The Lehigh Valley: A Natural and Environmental History. University Park, PA: The Pennsylvania State University Press. 361 pages. ISBN: 0271020946. FIRE: Forum for International Research in Education, v. 4, n. 1, 6 Dec. 2018.