The product is “Principles of Geotechnical Engineering” by Braja M Das 5th Ed., a textbook in the Technology & Engineering subject area. Published by Bill Stenquist and authored by Braja M. Das, this hardcover book contains 608 pages and is written in English. It covers topics related to Civil/Soil & Rock and Civil/General, making it suitable for higher education levels. The book is an advanced and technical resource focused on principles of geotechnical engineering, making it a valuable asset for students and professionals in the field.