Equations are the magical invocations of millions of modern mathemagicians. Have you ever needed one fast? Circles. Triangles. Spaceships. Mechanics. Trigonometry. Statistics. Areas. Liquids. Gases. Fireworks. Calculus. Fields. Dimensions. Matrices. Constants. Circuits. Probabilities. Gears. More. Mathematician Matthew Watkins and illustrator Matt Tweed have compressed almost every familiar equation from mathematics and physics into one tiny book. A quick, fun, stylish reference book with appeal to anyone interested in the sciences. Not for muggs. WOODEN BOOKS are small but packed with information. Fascinating FINANCIAL TIMES. Beautiful LONDON REVIEW OF BOOKS. Rich and Artful THE LANCET. Genuinely mind-expanding FORTEAN TIMES. Excellent NEW SCIENTIST. Stunning NEW YORK TIMES. Small books, big ideas.