The product is a new paperback book titled "The Principles of Quantum Mechanics" by P.A.M. Dirac. Published by Oxford University Press in 1981, this 4th edition book is part of the International Series of Monographs on Physics. With 314 pages, this textbook is a comprehensive resource for those studying physics, particularly focusing on the principles of quantum mechanics. Written in English, this book is a valuable addition to any academic or reference library, offering insights and explanations on this complex subject area.