: Major revisions include the 7th (1978) and 14th editions (2001).
First published in the 1960s, this work was designed to introduce university-level students to the fundamental principles of geology. It has undergone numerous revisions, with versions ranging from roughly 400 to over 500 pages.
The book is still protected by copyright (deceased author rights last 70 years in Brazil; Leinz died in 1983, so copyright expires in 2053). Unauthorized PDFs circulate, but legal alternatives exist:
The book provides a comprehensive introduction to the Earth's history, structures, and geological processes. While the "248" in your query might refer to a specific page or version, the standard 8th edition published by typically contains around 397 pages. Core Topics Covered
Many instructors keep a digital copy on reserve for students. They may also share a scanned chapter (fair use for education) without violating copyright.