Adafruit Pocket Ref - 4th Edition - by Thomas J. Glover

Have comprehensive information on diverse subjects right in your pocket without needing internet access. This pocket reference book is a treasure trove of knowledge.

Spanning 864 pages, it offers an organized collection of tables, maps, formulas, and conversions. Discover knot-tying diagrams, airplane signal charts, an American Sign Language dictionary, and a spice scale for hot peppers—all at your fingertips.

Open to a random page to learn something new or utilize its detailed index to find exactly what you need. Perfected since 1989 through numerous editions, it condenses essential knowledge into a compact form. It is lightweight at just half a pound and fits seamlessly in your shirt pocket with its sturdy black cover.