The Biology Twelfth Edition Raven Johnson Mason Losos Duncan is an advanced textbook designed for adult and further education levels. Published by McGraw-Hill Education in 2019, this textbook covers the subject area of life sciences with a focus on biology. The loose leaf format and ringbound binding make it easy to reference and study. Written by renowned authors including Peter H. Raven, Jonathan Losos, George B. Johnson, and Kenneth A. Mason, this comprehensive textbook is 2944 pages long and weighs 107.8 oz. It provides detailed information and insights into the world of biology, making it a valuable resource for students and professionals alike.