Newton's book that introduced the laws of motion is the Principia, short for Philosophiæ Naturalis Principia Mathematica. Its English title is Mathematical Principles of Natural Philosophy.
Newton published the three-volume work in Latin in London on 5 July 1687. The book presented his three laws of motion and law of universal gravitation, establishing a powerful mathematical foundation for classical mechanics. It also applied those ideas to planetary motion and other physical phenomena.
Edmund Halley played a major role in bringing the book to publication. He encouraged Newton to write it, helped manage the dispute and publication process, and paid printing costs when the Royal Society could not fund the project. Newton later produced revised editions in 1713 and 1726.
Readers sometimes confuse the Principia with Opticks, another important Newton work published in 1704. Opticks deals mainly with light, colour, and experiments in optics. De Revolutionibus was Nicolaus Copernicus's earlier astronomical work, while The System of the World is associated with an English translation and presentation of Newtonian ideas rather than the original book's standard title.