Pocket Ref is the ultimate compact reference book – 864 pages of comprehensive tables, maps, formulas, constants, and conversions that fit right in your shirt pocket. When you need information and don't have a signal or internet connection, this book has you covered.

First published in 1989 and refined through numerous editions, this 4th edition contains a remarkably diverse collection of practical information. From engineering formulas to knot-tying diagrams, airplane signals to the dictionary of American Sign Language, hot pepper spice scales to metric conversions – it's all here in a well-organised format.

Key Features

• 864 Pages – Comprehensive reference material on diverse subjects
• Pocket-Sized – Fits in a shirt pocket, weighs about half a pound
• Sturdy Construction – Durable black cover for everyday carry
• Comprehensive Index – Find exactly what you're looking for quickly
• No Power Required – Works anywhere, anytime

Topics Covered Include

• Mathematical tables and formulas
• Unit conversions and constants
• Maps and geographic data
• Technical reference charts
• Practical how-to diagrams
• And much more

Ideal For

• Engineers and makers
• Students and educators
• Field work and outdoor activities
• Anyone who appreciates having information at hand