Feynman and Albert Hibbs coauthored which standard path-integral textbook?

Feynman and Albert Hibbs coauthored the standard path-integral textbook *Quantum Mechanics and Path Integrals*.

Published by McGraw-Hill in 1965, the book grew from Feynman’s development of the path-integral formulation of quantum mechanics and Hibbs’s work as his student. It presents quantum amplitudes as sums over possible histories rather than relying only on the canonical operator approach.

Feynman’s path-integral method was developed in the 1940s and published in his 1948 paper “Space-Time Approach to Non-Relativistic Quantum Mechanics.” The approach made the action and Lagrangian central tools for quantum calculations and later became influential in quantum field theory.

A common mix-up is to choose one of Feynman’s lecture books, such as *Statistical Mechanics* or *Lectures on Gravitation*. Those are separate works; *Quantum Mechanics and Path Integrals* is the Feynman-Hibbs collaboration specifically associated with path integrals.