This undergraduate textbook on the key subject of geology closely follows the core curriculum adopted by most universities throughout the world and is a must for every geology student. It covers all aspects of petrology, including not only the principles of petrology but also applications to the origin, composition, and field relationships of rocks. Although petrology is commonly taught in the junior year, this book is a useful resource for graduate students as well.

"Sen (Am. Univ. of Sharjah, UAE) focuses on processes and provides a complete description of the various igneous rock associations and their tectonic settings. ? The text presupposes a significant familiarity with rocks and minerals and is most suitable for a senior-level or first-year graduate course. Summing Up: Recommended. Upper-division undergraduates through researchers/faculty." (G. N. Eby, Choice, Vol. 52 (10), June, 2015)

"'Petrology: Principles and Practice' comprise sixteen chapters (twelve of them address igneous rocks and the rest concern sedimentary and metamorphic rocks) aided by two appendices. ? I am confident that 'Petrology: Principles and Practice' by Gautam Sen would immensely serve to enthuse this generation of young undergraduate and (even) graduate earth science students by way of elucidating the principles underlying the thermo-mechanical dynamics of the Earth and its role in generating such fascinating products called as rocks." (N. V. Chalapathi Rao,Journal of the Geological Society of India, Vol. 84, 2014)