The “Indispensable Scratch and Sniff Guide to Cannabis” by Richard Betts is a unique reference book that combines technology and engineering with agriculture. Published by HarperCollins in 2021, this hardcover book features a guide to understanding cannabis in-depth. With a focus on the general subject area, it includes 22 pages filled with essential information for those interested in the agricultural aspects of cannabis. The book is 10.2 inches in length, 9.3 inches in width, and 0.6 inches in height, making it a valuable resource for anyone looking to learn about cannabis in a practical and informative way.